Expense Credit Doesn't Show on Expense Report

We accidentally charged a client twice for an expense. We are not able to undo the bill. When we do a Memo of Costs for the court it does not show that we applied a credit for the expense that was accidentally billed twice, therefore we always have to go through every bill and double check it against quickbook and determine why there is a difference. Is there a way to run a report of costs for a client that include any credits that were applied to the costs?

Thanks!