I have been trying to find guidance on how to apply a retroactive refund for overpayments on credit cards. I saw in another thread that in the case of credit card over payment, the refund cannot be applied to the current principal because that isnt really a refund, the institution is still keeping the money, that would only be permissible if it was requested by the member. Is there somewhere in the regulation that specifies how refunds are to be given?