Quote Originally Posted by paul3648 View Post
I use it with PayPal IPN without any problems. The customer has the choice of using his available credit before the total is finalized, so the store credit module should be compatible with any payment system.
It just occurred to me that you might be talking about a reward credit - a certain amount of points rewarded for each purchase. I don't use this function so can't say whether or not it works with Paypal.

I use this module for returns - rather than refund the credit card, I give them store credit which can be used on their next purchase.