In Patrons > Accounting > Transactions tab, when choosing "Issue refund" an extra transaction type "Account credit" is shown, besides the values that we added in the PAYMENT_TYPE authorized value category. It would make sense to also have this extra transaction type "Account credit" shown when creating a manual credit. Usually when creating a manual credit you will not pay the patron in cash or do a bank transfer, but rather add it as "account credit" to be used for outstanding fines/fees or future ones. Maybe helpful for bug #22872 ?