What is a pre-authorization / reservation?
A pre-authorization is essentially a temporary hold of a certain amount placed by a merchant on a customer’s credit card, and reserves funds for a future payment transaction.
How long is the reservation?
What happens to the reservation at the end of this period?
If nothing is done, after 7 days the pre-auth is cancelled by issuer automatically and no payment takes place.
How do I make a reservation for payment before the end of the period?
During the 7 days of reservation, the pre-auth may be used to get the payment (completion) by using "sale after reservation" (CTAP-spec name for this feature). The effect is immediate.
How to cancel a payment made by reservation?
During the 7 days, the pre-auth may be cancelled. The effect is immediate.