to reverse an AR refund entry in Sage 300 that does not have a bank code, you can follow these steps:

1. Open the Accounts Receivable module in Sage 300.
2. Go to the "Transactions" menu and select "Customer Refunds."
3. Locate the refund entry that you want to reverse and select it.
4. Click on the "Reverse" button at the bottom of the screen.
5. In the "Reverse Customer Refund" window that appears, make sure the "Bank Code" field is blank.
6. Select the appropriate reversing date and period.
7. Review the reversal details to ensure accuracy, and click "OK" to complete the reversal.

After completing these steps, the original AR refund entry will be reversed, and a new transaction will be created to reverse the refund. The resulting transaction will appear in the Accounts Receivable module, and any applicable GL accounts will be updated accordingly

hope this helps

Maybe I don't understand you clearly; however, there is no Reverse button on the Refund Entry screen.

Maybe I don't understand you clearly; however, there is no Reverse button on the Refund Entry screen.

Were you able to find a solution?

I have the same issue, unable to reverse due to a cash account that was selected, and cannot use A/R Adjustments due to same error message.