Once you manually key in a credit card, it is retained for that reservation.
If the bill does not yet have a credit card retained, the above box will show on the bottom right of the bill just below the remaining balance.
After you click "Add Credit Card" ThinkReservations will send the details to your credit card processor to attempt to validate the card. If successful, the card will be retained for that bill. Once a credit card has successfully been retained ThinkReservations will display the following message in place of the form:
You can charge a retained credit card as needed by selecting "New Payment" and choosing "Credit Card" from the list of payment methods.
Retain Multiple CardsIf you need to retain additional credit cards within a bill, choose NEW PAYMENT. Then select "Credit Card" at the payment type. Choose New... from the drop-down box below "Credit Card". A popup box will appear for you to enter the new card information.
ThinkReservations displays the name associated with the card, as well as the last four digits of the card number for your reference. The drop-down list shows the retained cards in the order in which they were entered, with the first card entered at the top.