Select the "Charge" option at the bottom left hand-side of the screen and the "Preauth" option at the top of the screen.

Enter the amount and press the "Preauthorise" button.

Tap the card close to the device. Once a successful transaction is completed, you can choose to print or share the receipt.

Select the "Capture" option at the middle bottom of the screen.

A pre-authorized transaction can be captured either by selecting the specific transaction from the transaction history, or by reading the card that was originally used.

In order to capture a pre-authorized transaction you may search and view the pre-authorized transactions, or read customer's card.

Upon choosing the desired transaction, 3 options appear:

a. Capture

b. *Release (Cancel the preauthorization)

c. Send receipt

Select "Capture" and enter the amount to be charged which can be up to the full amount of the pre-authorized transaction. Tap on "Continue" and confirm by choosing "Capture".