I think they suggested that you downgrade one's PayPal account from Business or Premier (where you pay about a 3% fee for all receipts) to a Personal account (where you can't accept receipts funded by a credit card, but there is no fee for accepting other types of receipts). Here:
https://www.paypal.com/us/cgi-bin/webscr?cmd=_help&eloc=111&unique_id=1405&source_page=_account&flow=

Robert