Identity Verification Preventing Fraud inside Online Marketplaces

Sellers and buyers are increasingly turning to KBY-AI‘s identity verification for online marketplace purposes in recent days.

Marketplace fraud is frequently perceived primarily as a problem affecting individual users, since buyers and sellers are often the parties who directly experience financial losses, fraudulent transactions, or other negative consequences. However, the impact of marketplace fraud extends far beyond the immediate users involved, as the platforms themselves can experience significant and long-lasting operational, financial, and reputational consequences.

The increasing prevalence of online identity fraud can gradually drive legitimate and trustworthy users away from a platform, increase the number of transaction disputes and refund requests, raise customer support and fraud investigation costs, reduce the overall quality and reliability of sellers operating within the marketplace, and place additional workloads and regulatory pressure on compliance, risk management, and trust-and-safety teams responsible for maintaining a secure and trustworthy environment.

In this article, we will take a closer look at the important role that identity verification can play as part of a comprehensive marketplace fraud-prevention strategy, explaining where identity verification should be introduced within the user journey, which types of users and transactions may benefit most from additional verification, and how different identity verification methods can be implemented to provide reliable and actionable evidence of a user’s identity while minimizing unnecessary friction, delays, abandonment, and inconvenience throughout the overall product experience.

Why should marketplaces care about identity verification?

The marketplace may not lose money directly at first, but a lot of issues may come up later. Let’s break them down.

Fraud can push users away from the transaction

When scam warnings, fraud reports, and negative consumer experiences repeatedly mention the same marketplace or online platform, users can gradually develop the perception that the platform itself is unsafe or unreliable, even when fraudulent activity is carried out by individual buyers, sellers, or third parties rather than by the marketplace operator.

As these warnings become increasingly visible through news coverage, social media discussions, consumer complaints, and word-of-mouth recommendations, potential customers may begin to associate the marketplace’s name with financial risk, fraudulent transactions, counterfeit products, or inadequate buyer protection, ultimately making them more hesitant to register, make purchases, provide personal information, or complete transactions through the platform.

Secondhand and peer-to-peer marketplaces provide a particularly clear example of this challenge because buyers frequently interact directly with individual private sellers rather than established retailers, while transactions may involve limited guarantees, fewer standardized consumer protections, and products that can be difficult or impossible to physically inspect and authenticate before payment is completed.

According to a Which? survey reported by The Guardian, 32% of buyers stated that they had experienced scams while using secondhand marketplaces during a two-year period, highlighting how widespread fraud can become within this type of digital commerce environment.

The problems reported by consumers can take many different forms, including receiving an item that does not match the seller’s description, receiving an empty package instead of the purchased product, purchasing counterfeit or imitation goods, or encountering other forms of deception after payment has already been made.

On certain individual marketplaces, the reported proportion of users experiencing fraudulent activity can reach as high as 50%, which can have a particularly damaging effect on consumer confidence because prospective buyers may begin to reconsider whether the potential benefits of purchasing through the platform are worth the perceived risks, ultimately causing them to think twice before completing a purchase and potentially encouraging legitimate customers to choose alternative marketplaces that they consider safer and more trustworthy.

Counterfeits can hurt sellers as much as buyers

It is important to recognize that seller identity verification, while serving as an important component of a broader marketplace trust and safety strategy, cannot by itself guarantee that every product offered through a platform is authentic, accurately described, or free from defects and misrepresentation.

Even when a seller has successfully completed an identity verification process and has been confirmed as a legitimate individual or business, that verified seller may still create a misleading product listing, provide inaccurate information about the item’s condition or origin, deliberately misrepresent its characteristics, or attempt to sell counterfeit products.

For this reason, marketplaces should not treat identity verification as a replacement for other fraud-prevention and content-moderation mechanisms, but rather combine it with comprehensive listing reviews, automated and manual product monitoring, brand and rights-holder reporting systems, suspicious-listing detection, product authenticity checks, and other controls designed to identify and remove potentially fraudulent or unauthorized goods.

What identity verification can provide, however, is a significantly stronger and more reliable evidence base for marketplace operators when they need to understand who is actually operating an account and who is ultimately responsible for transactions conducted through the platform.

By establishing a stronger connection between a marketplace account and a verified real-world identity, the platform can obtain clearer information about the individual or business receiving payments and payouts, investigate suspicious activity with greater confidence, and determine whether a previously restricted or problematic seller is attempting to return to the marketplace by creating a new account with different registration information, contact details, or account credentials.

This additional identity intelligence can therefore help marketplaces identify repeat offenders, reduce the effectiveness of account recycling and evasion strategies, support fraud investigations, and create greater accountability when fraudulent or abusive behavior occurs.

Counterfeit, unauthorized, or materially misrepresented products can create significant challenges for legitimate sellers because honest businesses and individuals may be forced to compete against suspiciously inexpensive listings that appear attractive to price-sensitive buyers but do not meet the same standards of authenticity, quality, sourcing, or product condition.

At the same time, the presence of fraudulent or counterfeit merchandise can generate a growing number of complaints from consumers, manufacturers, brands, intellectual-property owners, and other rights holders, increasing the operational burden placed on marketplace trust-and-safety, customer-support, compliance, and dispute-resolution teams.

More importantly, the widespread availability of questionable products can gradually undermine buyer confidence in the entire marketplace, particularly in product categories where authenticity, provenance, brand reputation, and genuine product quality represent an important part of the item’s overall value.

This concern is especially significant in categories such as fashion and luxury goods, jewelry and watches, cosmetics and personal-care products, consumer electronics, collectibles, designer products, branded accessories, and other high-value merchandise where buyers may be particularly sensitive to the possibility of receiving counterfeit, substituted, refurbished, or otherwise inaccurately represented products.

Buyer abuse can make good sellers stop listing

Fraud within an online marketplace is not necessarily driven exclusively by sellers, because buyers can also intentionally exploit weaknesses in the platform’s transaction, refund, dispute, and payment systems for their own financial benefit.

Buyer-side abuse can take many different forms, including falsely claiming that a purchased item was never delivered even when it was successfully received, returning a different or lower-value product instead of the original item, submitting an inaccurate or deliberately misleading “not as described” complaint in an attempt to obtain a refund, or initiating a payment chargeback after receiving and retaining the purchased goods.

Such behavior can create substantial financial and operational consequences for marketplaces and legitimate sellers alike, because even when the platform ultimately investigates the case and determines that the seller was not responsible for the alleged problem, the dispute-resolution process can still consume considerable time and internal resources, temporarily freeze transaction funds, delay seller payouts, increase customer-support workloads, and introduce additional uncertainty into otherwise legitimate transactions.

Over time, repeated buyer abuse can make sellers feel that every new order carries a certain level of financial and operational risk, potentially reducing seller participation and weakening the overall health of the marketplace.

It is equally important to understand that identity verification cannot, by itself, determine whether a particular package was actually delivered, whether a buyer genuinely received the correct product, or whether a return request or “item not as described” complaint represents an honest customer experience rather than a deliberate attempt to obtain an improper refund.

Determining those facts still requires reliable delivery and tracking information, carrier records, transaction history, return documentation, product photographs or videos, seller-provided evidence, payment information, and a structured review of the individual dispute.

Nevertheless, identity verification can become particularly valuable when the platform detects that similar suspicious buyer behavior is occurring repeatedly across what initially appear to be separate accounts. By establishing stronger links between verified individuals and their marketplace activities, identity verification can help platforms identify patterns in which the same person repeatedly creates or controls multiple accounts, changes devices, uses different payment cards, registers accounts with different addresses, or otherwise attempts to conceal the relationship between seemingly unrelated transactions.

When combined with device intelligence, payment-risk signals, address information, behavioral analysis, transaction history, and other fraud-detection mechanisms, identity verification can therefore help marketplaces recognize repeat offenders and prevent them from simply creating another account whenever an existing account is restricted, investigated, or associated with fraudulent activity.

What should seller identity verification cover?

It may be tempting to assume that seller identity verification within an online marketplace is essentially equivalent to a conventional Know Your Business (KYB) process, in which the platform primarily focuses on establishing whether a business is legally registered and genuinely operating, confirming that the company’s registration information and tax-related details are valid and consistent with authoritative records, and verifying that the individual who is creating, opening, or managing the seller account has the appropriate authority to represent the business and conduct commercial activities on its behalf.

While these checks can be highly relevant for marketplaces that work with established companies and professional merchants, treating seller identity verification as a purely traditional KYB procedure can be too narrow for the diverse range of sellers that commonly operate on modern digital marketplace platforms.

Unlike traditional business-to-business environments, online marketplaces often do not interact exclusively with formally incorporated companies or large commercial organizations. Their seller base can include sole proprietors and self-employed individuals, independent creators and freelancers, small-scale resellers, micro-merchants operating with limited organizational structures, home-based businesses, occasional sellers, and private individuals who may simply want to sell personal belongings or generate additional income through the platform.

Many of these sellers may not have a conventional corporate registration, a complex business structure, or the same type of publicly available business documentation that would normally be expected during a standard KYB process. Consequently, applying identical business-verification requirements to every seller can create unnecessary friction for legitimate users while still failing to address the specific identity and risk characteristics associated with different types of marketplace participants.

For this reason, many marketplaces can benefit from implementing a tiered KYB/KYC identity verification model that adapts the level and type of verification to the legal status, activity, risk profile, transaction volume, and privileges associated with each seller. Under such an approach, formally registered companies can undergo appropriate business verification procedures designed to confirm the existence and legitimacy of the organization, its registration information, relevant tax details, ownership or control information, and the authority of the person acting on its behalf.

Individual sellers who operate without a registered company can instead complete appropriate personal identity verification to establish that the person behind the marketplace account is a real and identifiable individual. As the seller’s activity increases, or when the seller requests access to higher transaction limits, larger payouts, additional marketplace privileges, enhanced visibility, greater buyer trust, or other higher-value capabilities, the platform can introduce progressively stronger verification requirements based on the associated level of risk.

This tiered approach allows marketplaces to maintain an appropriate balance between fraud prevention, regulatory and compliance requirements, seller accessibility, and user experience, while ensuring that higher-risk or higher-value marketplace activity receives a correspondingly stronger level of identity and business verification.

Identity Verification should match the seller’s privileges

The objective of an effective seller-verification program should not be to collect every conceivable piece of personal, business, financial, or identity information from every seller regardless of their circumstances. Instead, a more practical and risk-based approach is to establish a clear relationship between the level of verification required and the specific capabilities, privileges, transaction limits, product categories, and financial activities that a seller is permitted to access on the marketplace.

In other words, the amount and depth of verification should increase according to what the seller is allowed to do and the potential risk associated with those activities, rather than requiring every seller to complete the same extensive identity verification process from the moment they create an account. This approach can help marketplaces strengthen fraud prevention and trust while reducing unnecessary onboarding friction for legitimate sellers who have relatively low-risk or limited marketplace activity.

For example, a marketplace could introduce a progressive verification structure such as the following:

• A newly registered individual seller could initially be permitted to create an account and begin listing a limited number of relatively low-risk products using basic account information, while relatively low transaction and listing limits are applied until the seller establishes a history of legitimate activity on the platform.
• Before the seller receives their first payout, the marketplace could require more meaningful identity and financial verification, such as verification of an official identity document, confirmation that the seller’s identity information matches the account details, and verification of the bank account or other payout method to which marketplace earnings will be transferred. This creates a stronger connection between the marketplace account, the verified individual, and the destination of the funds.
• Before allowing a seller to list higher-risk or higher-value products, such as branded electronics, cosmetics, jewelry, luxury products, designer goods, or other categories that are particularly vulnerable to counterfeiting and product misrepresentation, the platform could introduce enhanced seller verification, additional proof of authenticity or sourcing, and category-specific approval requirements. This would allow the marketplace to apply stronger controls where counterfeit activity or consumer harm is more likely to occur without imposing the same requirements on every low-risk seller.
• Before allowing sellers to offer controlled, regulated, or age-restricted products, the marketplace could require a substantially higher level of verification, potentially including formal business verification, relevant licensing information, regulatory documentation, proof of authorization to sell particular products, age-related controls, and additional category-specific compliance requirements. The purpose would be to ensure that sellers operating in sensitive product categories meet the legal and platform-specific requirements before they gain access to those capabilities.
• When significant changes or unusual risk signals appear in a seller’s activity, such as an unexpected and substantial increase in sales volume, a sudden change to the payout account, unusual transaction patterns, a rapid expansion into high-risk product categories, or a significant increase in customer complaints and disputes, the marketplace could temporarily require re-verification before releasing certain funds, increasing transaction limits, or granting additional account privileges. This type of risk-triggered verification allows the platform to respond dynamically to changing circumstances rather than relying exclusively on a one-time verification process performed when the seller initially registered.

This type of progressive verification strategy allows a marketplace to apply more verification when more trust, money, responsibility, or platform access is involved, while keeping the initial experience relatively straightforward for legitimate users. It also provides marketplaces with greater flexibility to increase or decrease verification requirements as a seller’s behavior, transaction volume, product categories, and overall risk profile change over time.

Many major online marketplaces have already incorporated merchant identity and financial verification into their seller onboarding procedures as part of their broader efforts to establish seller legitimacy, protect customers, reduce fraud, and comply with applicable regulatory requirements.

For example, Amazon requires marketplace sellers to provide identity-related documentation and banking or payout information as part of its seller registration and verification processes before they can fully access and operate within the platform. This illustrates how seller verification can be integrated directly into marketplace onboarding rather than being treated as a completely separate process that only occurs after suspicious activity has already been detected.

What about buyer identity verification?

The objective of an effective seller-verification program should not be to collect every conceivable piece of personal, business, financial, or identity information from every seller regardless of their circumstances. Instead, a more practical and risk-based approach is to establish a clear relationship between the level of verification required and the specific capabilities, privileges, transaction limits, product categories, and financial activities that a seller is permitted to access on the marketplace.

In other words, the amount and depth of verification should increase according to what the seller is allowed to do and the potential risk associated with those activities, rather than requiring every seller to complete the same extensive verification process from the moment they create an account. This approach can help marketplaces strengthen fraud prevention and trust while reducing unnecessary onboarding friction for legitimate sellers who have relatively low-risk or limited marketplace activity.

For example, a marketplace could introduce a progressive verification structure such as the following:

• A newly registered individual seller could initially be permitted to create an account and begin listing a limited number of relatively low-risk products using basic account information, while relatively low transaction and listing limits are applied until the seller establishes a history of legitimate activity on the platform.
• Before the seller receives their first payout, the marketplace could require more meaningful identity and financial verification, such as verification of an official identity document, confirmation that the seller’s identity information matches the account details, and verification of the bank account or other payout method to which marketplace earnings will be transferred. This creates a stronger connection between the marketplace account, the verified individual, and the destination of the funds.
• Before allowing a seller to list higher-risk or higher-value products, such as branded electronics, cosmetics, jewelry, luxury products, designer goods, or other categories that are particularly vulnerable to counterfeiting and product misrepresentation, the platform could introduce enhanced seller verification, additional proof of authenticity or sourcing, and category-specific approval requirements. This would allow the marketplace to apply stronger controls where counterfeit activity or consumer harm is more likely to occur without imposing the same requirements on every low-risk seller.
• Before allowing sellers to offer controlled, regulated, or age-restricted products, the marketplace could require a substantially higher level of verification, potentially including formal business verification, relevant licensing information, regulatory documentation, proof of authorization to sell particular products, age-related controls, and additional category-specific compliance requirements. The purpose would be to ensure that sellers operating in sensitive product categories meet the legal and platform-specific requirements before they gain access to those capabilities.
• When significant changes or unusual risk signals appear in a seller’s activity, such as an unexpected and substantial increase in sales volume, a sudden change to the payout account, unusual transaction patterns, a rapid expansion into high-risk product categories, or a significant increase in customer complaints and disputes, the marketplace could temporarily require re-verification before releasing certain funds, increasing transaction limits, or granting additional account privileges. This type of risk-triggered verification allows the platform to respond dynamically to changing circumstances rather than relying exclusively on a one-time verification process performed when the seller initially registered.

This type of progressive verification strategy allows a marketplace to apply more verification when more trust, money, responsibility, or platform access is involved, while keeping the initial experience relatively straightforward for legitimate users. It also provides marketplaces with greater flexibility to increase or decrease verification requirements as a seller’s behavior, transaction volume, product categories, and overall risk profile change over time.

Many major online marketplaces have already incorporated merchant identity and financial verification into their seller onboarding procedures as part of their broader efforts to establish seller legitimacy, protect customers, reduce fraud, and comply with applicable regulatory requirements. For example, Amazon requires marketplace sellers to provide identity-related documentation and banking or payout information as part of its seller registration and verification processes before they can fully access and operate within the platform.

This illustrates how seller verification can be integrated directly into marketplace onboarding rather than being treated as a completely separate process that only occurs after suspicious activity has already been detected.

How marketplace identity verification works

Trigger the check at the right moment

Within an online marketplace environment, identity verification is generally most effective when it is triggered at specific points in the customer or seller journey where the potential for financial loss, fraud, regulatory exposure, account abuse, or other forms of risk becomes significantly higher. Rather than requiring every marketplace participant to complete the same comprehensive verification process immediately after registration, platforms can use risk-based triggers to determine when additional identity evidence is actually necessary.

This approach allows the marketplace to maintain a smoother experience for ordinary users while applying stronger controls at the moments when a user’s actions create greater potential exposure for the platform, its sellers, buyers, payment partners, or regulatory obligations.

In a marketplace, some of the strongest and most practical verification triggers typically include:

• Seller onboarding before full selling access: A newly registered seller may be allowed to create an account or prepare listings initially, but identity or business verification can be required before the seller receives unrestricted selling privileges, begins processing significant transaction volumes, or gains access to marketplace features that could expose buyers and the platform to greater risk.
• The first payout or a change to the payout account: Verification can be requested before a seller receives their first significant payment, particularly when marketplace funds are being transferred to a newly added bank account or payout destination. A subsequent change to the payout account can also trigger additional verification because fraudsters may attempt to compromise accounts and redirect legitimate seller earnings to financial accounts under their control.
• Access to high-risk or highly counterfeited product categories: Additional verification can be introduced when a seller attempts to list products in categories that historically carry greater fraud, counterfeiting, regulatory, or consumer-protection risks, including electronics, luxury goods, alcohol, tobacco, adult products, and other controlled or sensitive merchandise. Depending on the category and applicable laws, the platform may require identity verification, business verification, licensing information, age-related checks, authenticity evidence, or specific category approval before allowing the seller to proceed.
• High-value purchases from new or unusual buyer accounts: A buyer who has recently created an account and suddenly attempts to make a particularly expensive purchase, or whose transaction behavior differs substantially from the account’s established history, may be asked to provide additional identity or payment-related evidence before the transaction is completed. This can help the marketplace distinguish ordinary purchasing behavior from potentially compromised accounts, synthetic identities, stolen payment methods, or other forms of transaction fraud.
• Account recovery following suspicious login or security activity: If a user attempts to regain access to an account after unusual login activity, repeated failed authentication attempts, unfamiliar devices, unexpected geographic changes, or other suspicious security events, additional identity verification can be required before account access, sensitive account changes, or financial functions are restored. This provides an additional layer of protection against attackers who may otherwise attempt to use account-recovery mechanisms to take control of legitimate marketplace accounts.
• Age verification before fulfillment of age-restricted orders: When a purchase involves products that are legally restricted by age, the marketplace can require appropriate age verification before allowing the order to proceed to fulfillment. This ensures that the relevant eligibility requirement is confirmed at the appropriate point in the transaction rather than unnecessarily requiring every marketplace user to complete age verification when they are not purchasing restricted products.

The underlying principle is that verification should remain closely connected to the specific action that creates the risk. Instead of introducing unnecessary identity checks throughout the entire customer journey, marketplaces can apply verification dynamically according to the user’s behavior, transaction value, requested privileges, product category, account history, and other relevant risk signals.

As a result, a casual buyer purchasing an ordinary low-value product can generally continue through the checkout process with minimal interruption, while a seller requesting access to marketplace funds, a merchant attempting to enter a high-risk product category, or a buyer attempting to purchase restricted merchandise can be asked to provide stronger and more appropriate evidence of identity or eligibility.

This risk-based model allows marketplaces to strengthen fraud prevention and compliance controls without turning identity verification into a universal source of friction for every legitimate user.

Capture the ID document

The verification process typically begins when the user is asked to capture and submit a clear image of an accepted identity document, such as a passport, driver’s license, national identity card, residence permit, or another supported form of government-issued identification. Once the document image has been submitted, the verification system first evaluates whether the captured image meets the basic technical and quality requirements necessary for reliable processing.

This can include determining whether the text and other important document information are sufficiently readable, whether the complete document and all of its relevant edges are visible within the captured image, whether excessive glare, reflections, shadows, or overexposure are obscuring important information, whether the image contains significant blur or insufficient resolution, and whether there are indications that the document may actually be a photograph, scan, or representation being displayed on another screen rather than a genuine physical document being presented to the camera.

This initial image-quality assessment is particularly important because not every unsuccessful verification attempt should automatically be interpreted as evidence of fraud or malicious behavior. A legitimate seller or buyer can fail an identity-verification check for entirely innocent and technical reasons, including having a worn or damaged identity document, capturing the document under poor lighting conditions, using a low-quality camera, experiencing autofocus or image-capture problems, holding the document at an unsuitable angle, covering part of the document accidentally, or attempting to verify a document type that is less commonly encountered in the marketplace’s primary geographic or customer markets.

If these legitimate users are incorrectly treated as suspicious simply because their first image cannot be processed successfully, the platform can unnecessarily increase false rejection rates, create user frustration, reduce onboarding completion rates, and generate additional workload for customer-support and manual-review teams.

For this reason, a well-designed identity-verification experience should provide users with clear and understandable capture instructions before and during the document-scanning process, helping them position the document correctly, use appropriate lighting, avoid reflections and shadows, keep the entire document within the camera frame, and hold the device steadily enough to produce a sufficiently sharp image. When the captured image does not meet the required quality threshold, the system should ideally provide a clear explanation of what needs to be corrected and give the user an opportunity to capture the document again rather than immediately rejecting the verification attempt or sending the case to manual review.

Providing an effective retry mechanism and useful real-time capture guidance can therefore reduce avoidable verification failures, distinguish technical capture problems from genuine fraud indicators, improve the overall user experience, and prevent legitimate cases from unnecessarily reaching customer support or more expensive manual-review workflows.

Check the document itself

Once the identity document image has been successfully captured and passes the initial image-quality checks, the verification system can proceed to automatically read, interpret, and validate the information contained on the document. At this stage, the system does more than simply perform optical character recognition (OCR) to extract visible text; depending on the document type, country, available data sources, and capabilities of the verification solution, it can analyze multiple document features and compare information from different sections of the ID to determine whether the information appears valid, consistent, and structurally authentic.

Depending on the type of identity document being processed, the verification process may include several different checks, such as:

• Extracting key identity information: The system can automatically recognize and extract important fields such as the holder’s full name, date of birth, document number, expiration date, nationality or issuing country, and other relevant personal or document information required for the verification process.
• Checking the document’s validity period: The system can identify the document’s issue and expiration dates and determine whether the document is still within its valid period, allowing expired passports, driver’s licenses, identity cards, residence permits, and other time-limited documents to be identified during the verification process.
• Comparing information across different document data sources: Where supported, the system can compare information obtained from the document’s visual inspection zone (VIZ), machine-readable zone (MRZ), barcode or other machine-readable elements, and, for compatible electronic identity documents, information obtained from the embedded RFID/NFC chip. Comparing multiple sources can help identify inconsistencies that may not be apparent when only one section of the document is analyzed.
• Analyzing document structure and security characteristics: The verification engine can examine the document’s overall layout, text positioning, fonts, formatting patterns, photographs, colors, security features, machine-readable elements, and other document-specific characteristics to determine whether they correspond to the expected structure of a legitimate document issued by the relevant authority.
• Checking for inconsistencies and potential manipulation: The system can analyze the relationships between different data fields and document elements to identify unusual inconsistencies or characteristics that may indicate that information has been altered, replaced, physically tampered with, digitally edited, or otherwise manipulated after the original document was issued.

Together, these checks allow an ID verification system to move beyond simple text extraction and perform a more comprehensive assessment of the document’s validity, consistency, integrity, and potential signs of manipulation. This multi-layered approach is particularly useful for marketplace identity verification because a document that contains readable information is not necessarily a genuine or unaltered identity document; reliable verification may require examining the document as a whole and comparing multiple independent sources of information whenever those sources are available.

Match the selfie to the document

The next stage of the identity verification process typically requires the user to capture a live selfie using the device’s camera. The verification system then performs facial matching by comparing the facial characteristics visible in the newly captured selfie with the portrait photograph contained on the previously submitted identity document.

Rather than relying solely on the authenticity of the document itself, this additional biometric comparison helps determine whether the individual currently interacting with the platform is the same person whose identity is represented by the submitted document. This is particularly important because a fraudster could potentially obtain, steal, or otherwise misuse a genuine identity document belonging to another person and use that legitimate document to create an account, meaning that document verification alone would not necessarily establish that the person presenting the document is its rightful holder.

For seller verification, facial matching can create a stronger connection between the real-world individual, the verified identity document, and the marketplace account being created or managed. This can help the platform establish that the person opening the seller account is actually the individual identified by the submitted document, which can be particularly valuable before granting access to seller payouts, higher transaction limits, sensitive marketplace functions, or other privileges that require a greater level of trust.

It can also provide an additional identity signal when the platform needs to investigate suspicious activity, account ownership, repeated registrations, or attempts to circumvent previous account restrictions.

For buyer verification, the same face-matching capability can be applied selectively in situations where stronger identity evidence is necessary rather than requiring every customer to complete biometric verification for ordinary purchases. For example, a marketplace may use facial matching as part of an age-verification process for age-restricted products, during account recovery when there are concerns that an unauthorized person is attempting to regain access to an account, or when a newly created or unusual account attempts to complete a particularly high-value transaction.

In these higher-risk situations, confirming that the person interacting with the platform corresponds to the identity associated with the submitted document can provide an additional layer of protection before the marketplace allows the transaction, account recovery, or other sensitive action to proceed.

 

Frequently Asked Questions

Are online marketplaces legally obligated to verify sellers?

Sometimes. In the US, the INFORM Consumers Act applies to certain high-volume third-party sellers of new or unused consumer goods, while the EU Digital Services Act requires marketplaces to verify identity and contact information for traders; payment providers may also conduct separate KYC checks before releasing payouts. The specific obligation depends on the seller, product, jurisdiction, and payment provider involved.

How does identity verification differ from KYC and KYB?

Identity verification connects an individual to their claimed identity documents. KYC involves broader customer due diligence, while KYB evaluates a business—including its registration, controllers, beneficial owners, and authorized account representative; an ID check may support either process but cannot satisfy all requirements by itself.

What happens when marketplace identity verification fails?

An unsuccessful automated check should not automatically indicate fraud: glare, blur, transliteration, name changes, and unsupported documents can all result in false rejections. The user should receive clear retry guidance and, when necessary, access to manual review or an alternative verification method.

What happens to my ID after completing marketplace verification?

No single retention period applies to every marketplace. The platform should retain raw ID and biometric data only for a documented legal or fraud-prevention purpose, delete or anonymize it once that purpose ends, and determine separately whether a limited audit record needs to be retained.

Conclusion

Marketplaces must protect both sides of every transaction: sellers and buyers alike. They are increasingly adopting identity verification to achieve these goals. Done properly, this helps reduce fraud without turning routine marketplace activity into an unnecessary struggle. We are higly recommend KBY-AI‘s identity verification solutions to build your perfect project.