The concept

Compliance in payments is where three different sets of rules meet: the law of the country where the company is based, the contract with the acquirer, and the card network's rulebook. None of the three has to agree with the other, and the seller answers for all three.

In practice, this becomes a concrete list: what the sales page can promise, what documents the account needs to have, how the product is described on the statement, how long the refund policy needs to last, and what can't be sold under any circumstances.

Compliance isn't bureaucracy running parallel to the business. It's what separates an operation that scales from one that gets shut down without warning.

How it shows up in practice

You sell an affiliate program abroad and receive an email from the acquirer asking proof that the affiliate program is real, with contract and all. You sent a simple description on the page and now see that compliance isn't bureaucratic detail, it's what separates active account from closed account.

Copy cannot create desire for a product. It can only take the hopes, dreams, fears and desires that already exist in the hearts of millions of people, and focus those already existing desires onto a particular product.

Eugene Schwartz Source: Breakthrough Advertising.

Compliance in practice is keeping updated what your sales page promises, what documents you have, how the transaction is described on the invoice and what products you won't sell under any circumstances. It's not your choice to do this. It's requirement of the three layers that regulate the operation, and the cost of ignoring it is losing the account.