To issue a refund, log in to Tranzpay. Click on Reports, then Transaction Report. Do a search that includes the date of the original payment. There should be a yellow Void button or a Green Refund button next to the transaction (depending on if the transaction has settled or not).

If the transaction is settled, and a green Refund button appears: Click Refund. You will see a pop up asking if you are sure you want to Refund the transaction. Click OK. Then select the amount of the refund you wish to process.

The 'base' amount is the transaction amount without any fees.

The 'full' amount will include the transaction amount plus any fees.

Or you can select a Partial amount and type in an amount. Click Refund. 

If the transaction has not settled, and you see a Yellow Void button, you can Void the original transaction. The customer will not be charged the for the transaction and no funds will leave their account.  Please note that the authorization amount may remain on hold until their bank releases the hold.