Hello there, @InsideoutDA.
Let's get this straightened out.
Aside from doing a Transaction Search in the Merchant Service Center, we can search using the existing Check Transaction. I'd be glad to walk you through how:
- Sign in on the Merchant Service Center Portal.
- From the Processing Tools section, select Void an eCheck.
- Select the appropriate eCheck to void.
- Click Submit.
Please know that if the transaction is not available, this can no longer be voided.
Here's an article that outlines a detailed information about voiding a check transaction within Merchant Service Center.
Should you have other queries about processing a refund for a bank transfer payment, just let me know as I'm here to help.
