Reverses the last attempted transaction.
[VB.NET] Public Sub ReverseLastTransaction()
[C#] public void ReverseLastTransaction();
If a transaction times out or you are otherwise unsure if it completed successfully, immediately use this method to reverse it. If the transaction had gone through successfully, the Response Code will be "00" and the other Response properties will show the results of the reversal. If the transaction was never actually received by the FDMS Closed Loop Gift Card System you will get a Response Code of "33", indicating that no previous transaction was found to reverse.