Cathy's Catering provides lunches to a large law firm on an weekly basis, creates a monthly invoice, and has authorization to charge their credit card. The customer called after reviewing the paid invoice and said that the salmon for the last lunch tasted too fishy. As a goodwill gesture, Cathy has agreed to reduce next month's invoice for an agreed-upon amount. She doesn't want to forget to do so. What do you advise Cathy to do in QuickBooks Online?
A. Create an expense.
B. Put it on a sticky note.
C. Create a vendor credit.
D. Create a refund receipt.
E. Create a delayed credit.