Paymet proess for Refund creates a check but is missing customer TIN and reason code

This is a federal Customer and is very particular about the Tax Identifcation number showing after the payment process.

We created a test refund following these steps:

1.       On the apply refund line there  is a drop down for ‘Application reference Reason’ with paid twice , overpayment and return as options.

 We chose ‘overpayment’.

2.       After saving the refund, AP invoice was created without Customer TIN.

3.     We used  Customization to add TIN information in AP form.

4.       The application shows TIN number on the AP Invoice.

5.       We saved and ran Payment process.

6.       The payment is created but the reason code is missing and Customer TIN is missing.