Third-party payment
A third-party payment is a payment that involves someone other than the account holder — money moving to or from a party who is not the person or business that owns the account.
What it means. Most payments are "first-party": the account holder pays or is paid directly. A third-party payment introduces another party into the flow — for example, an account receiving funds on behalf of someone else, or paying out to a party unconnected to the account holder. The concept matters because who is genuinely behind a payment is central to financial-crime controls, and third-party involvement can complicate the picture of who is really sending or receiving money.
Why it carries risk. Third-party arrangements are scrutinised closely in regulated finance because they can obscure the true source or destination of funds — a route sometimes used to disguise money laundering by inserting intermediaries between the real parties. As a result, many account types, particularly personal ones, restrict or prohibit third-party payments, requiring that money moves only between the account holder's own accounts or clearly identified counterparties. Where third-party flows are permitted, they attract additional due diligence, since the firm must understand and be comfortable with the relationships involved.
Where it fits. Understanding first-party versus third-party flows is important for both compliance and account design. It connects directly to Know Your Customer and Know Your Business checks (establishing who is really transacting) and to transaction monitoring (watching for flows that don't fit the account holder's profile). The distinction shapes what a given account is and isn't allowed to do, and it is one of the boundaries that separates a well-controlled account from one that could be misused — which is why it is treated as a deliberate design decision rather than an afterthought.