During checkout, customers can use a credit balance to (partially) pay for an order in conjunction with a credit card or eCheck payment:
Note: Below are possible reasons of why credit balance is not showing up during checkout:
A credit balance can only be used by customers to pay for purchases associated with the same remittance account as the credit balance (if your organization has 6 events associated with remittance account A and 4 events associated with remittance account B, and a customer was issued a credit balance for an event associated with remittance account B, then the customer can only spend that credit balance on events associated with remittance account B).
For an order on a payment plan, a credit balance can only be used to pay for the deposit, not for installments.
Payment by credit balance is not available if an order results in payment to more than one remittance account (e.g. the order includes a donation, third-party merchandise purchase, USAT membership fee or an event series).