To add an authorize a dollar amount or increase the amount of a current Authorization on a guest credit card midway through a stay.
Some credit cards (usually American Express, Discover, and Diners Club) do not allow incremental authorizations. If this occurs, you will not see any errors, but when you look at the Amount Authorized, it will be the original value. This is not a bug in the system, it is just how some issuing banks still work. If you need to adjust the authorization for one of these card types, you will need to call your merchant bank and get a verbal authorization, as BookingCenter cannot do this.
To Add an Authorization to an existing credit card.
To add a new credit card
Click "New Transaction" You can either select the existing credit card on file or add a new credit card to authorize against. If you would like to process the less expensive swiped rate, then, when the cc# entry field has focus, the cursor is flashing in the text entry field, swipe the customers card. This will collect the swipe information.