Merchant onboarding KYB: what marketplaces should cover

Marketplace growth creates a paradox: every new seller can expand choice, reach and revenue, but every new seller also introduces risk. As volumes rise, light-touch checks and manual reviews become slower, less consistent and harder to scale across markets. Genuine sellers can be delayed by document requests, while compliance and operations teams spend more time piecing together incomplete information. At the same time, buyers increasingly expect platforms to know who is selling to them, and regulatory scrutiny is rising. That makes seller verification a business priority, not simply a back-office task. A well-designed know your business (KYB) process helps marketplaces add sellers without losing control, protecting trust while keeping onboarding moving. 

What is KYB, and why should marketplaces care?

KYB is the process of confirming that a business exists, understanding who owns or controls it and assessing the risks associated with onboarding it. It is related to know your customer (KYC), but the two are not interchangeable: KYC verifies individual people, while KYB verifies businesses and the people behind them. 

That distinction matters for marketplaces because sellers are often business customers, even when the platform itself is consumer-facing. A sole trader, limited company or international merchant is not simply another user account. The marketplace needs to know whether the business is legitimate, who benefits from it and whether it presents relevant financial crime or reputational risk. Effective KYB creates that foundation without forcing genuine sellers through a one-size-fits-all process. 

How marketplace merchant onboarding KYB works in five steps

1. Business entity verification. Confirm that the seller's business is registered, active and matches authoritative records. Automated data checks can reduce reliance on uploaded documents and help straightforward applications progress faster.
   
   
2. UBO and director discovery. Identify directors and ultimate beneficial owners (UBOs) to understand who owns or controls the business. This is especially important where ownership structures are layered or span several jurisdictions.
   
   
3. Screening. Screen the business and relevant individuals for sanctions, politically exposed person (PEP) status and adverse media. Screening should surface meaningful risk indicators for review rather than treating every match as equally significant.
   
   
4. Risk-based decisioning. Use the information collected to apply proportionate workflows. Lower-risk sellers should move forward quickly, while higher-risk or incomplete applications are routed to specialists with the evidence needed to decide.
   
   
5. Ongoing monitoring. KYB should continue after onboarding because ownership, registration status and risk exposure can change. Monitoring for material changes helps marketplaces respond when a seller's profile no longer matches the original decision.

Together, these capabilities create a more complete view than entity verification alone. They also give compliance and operations teams a consistent framework for handling exceptions as seller volumes grow. With access to 600m+ company records, 200 beneficial ownership registries and 2,500 PEP, sanctions and adverse media watchlists, GBG Detected supports comprehensive business and ownership checks at scale. 

What good marketplace KYB looks like

Good marketplace KYB is fast, automated, global, risk-based and continuous. Straightforward sellers should be verified in minutes rather than days, with automation handling repeatable checks and human expertise focused on genuine exceptions. GBG Detected can reduce end-to-end onboarding time by up to 60% and cut manual KYB checks by 67% on average, helping teams focus on higher-risk investigations rather than routine reviews. 

It must also work across borders. International sellers, including businesses in hard-to-reach markets, should be assessed through a consistent operating model even when local data structures differ. We support identity verification across 195+ countries, helping marketplaces apply a more consistent approach internationally. Risk-based workflows can then request additional evidence only when the seller’s profile warrants it, while continuous monitoring alerts teams to relevant changes after activation. 

Turn KYB into a growth enabler

KYB is more than a compliance tick-box. When it is fast, proportionate and connected, it helps genuine sellers reach buyers sooner, gives internal teams a clearer way to manage risk and supports expansion without multiplying manual work. By reducing friction and improving the seller experience, GBG Detected can boost business conversions by up to 50%, turning verification from an onboarding bottleneck into part of the marketplace’s growth infrastructure. 

Learn how you can streamline seller onboarding and grow your marketplace. 

Marketplace KYB FAQs