https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=35440 --- Comment #3 from Esther Melander <esther.melander@bywatersolutions.com> --- Some additional insight on why this is happening. The library had a circulation rule to refund lost item charge (only if unpaid). To recreate 1. Set default refund policy to Refund lost item charge (only if unpaid) 2. Create a charge on a patron account of $150.00 3. Pay the charge as cash 4. Issue a refund, but only refund $5.00 as cash 5. See that it causes a 500 error In this case Koha is trying to refund something that has already been paid, which can't happen based on the circulation rule. Instead of a 500 error, there should be "can't refund" warning. As an extension of this bug, I can do a full refund, which also should not happen based on the circulation rule. -- You are receiving this mail because: You are the assignee for the bug. You are watching all bug changes.