Glossary · Updated 19 October 2026

onboarding

Onboarding is the process by which a business is identified, verified, risk-assessed and set up to accept payments: collecting its details, running KYB and UBO checks, assigning a merchant category code and linking a bank account for payouts. In a software platform it can happen inside the product.

Onboarding is where a customer either starts taking payments or gives up. Traditionally it meant a separate application to an acquirer, paper or PDF, with a wait for underwriting. Built into a software product it becomes a short flow at the moment the customer needs it: company number, owner details, what they sell, where to pay them, done.

For a platform the design of this flow is one of the four levers that decide whether existing customers move. If a customer who already runs the platform's software can switch their payments on in minutes without re-entering what the platform already knows, moving costs them nothing. If they have to leave the product, fill in a form and wait, most will not. The regulated acquiring partner sets what has to be collected and does the verification; the platform owns the experience and can pre-fill, stage and resume it. Synapto designs this flow with the platform and builds the payment products around it; the platform's own developer integrates it.

What to watch: the drop-off point. Measure completion at each step. The usual losses are the UBO step, the bank account step and any step that asks for a document upload. Every one of those can be moved later or made optional until volume requires it.

Sources

  1. The Money Laundering, Terrorist Financing and Transfer of Funds (Information on the Payer) Regulations 2017, regulation 28 (customer due diligence measures), 26 June 2017

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