When using the SecureTable module, you can choose the terminal's behavior when a communication issue causes a transaction to appear a second time (a duplicate version). By default, the terminal reposts the transaction, but you can choose to disable the duplicate transaction on the terminal.
From the main screen, touch the Menu button.
Enter the merchant password and touch Confirm.
Scroll to the Semi-integrated configuration section and touch SecureTable options.
Scroll to the Duplicate transaction prevention section.
Touch the option you wish to use for the terminal:
Repost
Off
If you have more than one terminal, repeat steps 1 to 5 for each additional terminal to configure the terminal's behavior for duplicate transactions.