Press the FUNC key on the terminal.

Scroll up to option 7. Void on the Function Menu.

Enter the Terminal Password. (Today’s date in MMDDYYYY format)

Enter the Transaction Number.

The Terminal will display the transaction, if it’s the correct one, press ENTER if not, press CANCEL.

Terminal will ask if you want to Void that transaction, if Yes Press ENTER, if you don’t then press CANCEL.

Press Cancel if you don’t want the Customer Copy of the receipt to print.