KYB verifies a company's legal existence, ownership, and control before it can transact. What it checks, who counts as a beneficial owner, and how it differs from KYC.
KYB, Know Your Business, verifies that a company legally exists, confirms who owns and controls it, and screens those individuals before the company is allowed to send or receive money. It is the business-side counterpart to KYC: a payment provider cannot know whether it is safe to pay a company without first knowing who actually stands behind it.
KYB exists because a shell company is an easy way to hide who is really moving money. A registered business name and a bank account look legitimate on the surface; the ownership and control behind them are where risk actually lives, which is why regulators require providers to look past the entity to the humans running it.
A complete KYB check covers four layers:
Skipping any layer leaves a gap. A provider that checks only registration, without tracing ownership to real people, can end up doing business with a company controlled by someone on a sanctions list.
The clearest definition comes from FinCEN's Customer Due Diligence rule, built on two prongs. The ownership prong: any individual who, "directly or indirectly, through any contract, arrangement, understanding, relationship or otherwise, owns 25 percent or more of the equity interests of a legal entity customer." The control prong: at least one individual with "significant responsibility to control, manage, or direct" the entity, such as a CEO, CFO, or managing member, regardless of ownership percentage. Full detail is in 31 CFR 1010.230(d).
That two-prong structure exists because ownership alone misses control. A company can be owned by a diffuse group of investors, none crossing 25 percent, while one individual runs every decision. The control prong catches that person even when the ownership math would not.
KYC (Know Your Customer) verifies one individual: identity documents, address, and screening against sanctions and watchlists. KYB verifies a legal entity and then applies KYC to the people who own or control it. Opening a business account almost always triggers both: KYB on the company, KYC on each beneficial owner and often on signers and directors too.
The practical difference shows up in documentation. KYC needs a passport or ID and a selfie. KYB needs incorporation documents, a certificate of good standing, an ownership chart, and identity documents for every beneficial owner identified along the way, which is why KYB usually takes longer and involves more back-and-forth than an individual signup.
Any time a business, not an individual, is the account holder or the counterparty receiving payment above a threshold set by the provider's risk policy. Marketplaces onboarding seller accounts, platforms paying out to vendor companies rather than individual contractors, and any B2B cross-border payment all trigger KYB somewhere in the flow. Our stablecoin payments guide covers where compliance checks like KYB sit inside a payout flow, and the broader VASP licensing context that requires programs like this is in what is a VASP. Requirements also shift as rules like MiCA and the GENIUS Act take effect, tracked in our regulation tracker.
BlindPay runs KYB on every business account before it can send or receive a payout: entity verification, ownership mapping, beneficial owner screening, and sanctions checks, built into the same API used to move USDC and USDT over local rails like Pix and SPEI. The compliance page covers the full program, and the resources hub has more on how the pieces fit together, including what a stablecoin API does end to end.
This article is for general information only and is not legal, tax, or financial advice.
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