credit card processing for one shop using for another

suppose you have online payment processing from a payment processor and the application form for credit card processing that is given by the payment processor was from another company ( so for instance when you are client with payment processor A and you want credit card processing approved they give you application form that is from a much bigger company like Worldpay).

in this case when you get approved for credit cards who will check you actually use it for the site you asked it for? is…

credit card processing for one shop using for another