TryNow automatically tracks when an existing authorization is set to expire and re-authorizes a shopper's card one day before. This requires no action from the merchant.
The shopper will see a new authorization appear on their statement and the old authorization will fall off in 24-48 hours, depending on bank processing. The shopper is notified via email before a re-authorization occurs.
Banks have limits around authorization periods. These authorization periods differ by card and can be extended periods for Shopify Plus merchants. See Shopify's documentation here.
The shopper receives a communication over email notifying them that the re-authorization is about to occur:
On a shopper's credit card statement, this appears as a new authorization, while the old authorization will be void or will fall off. There may be a short period of time (24 hours) in which the shopper may see two authorizations - this is due to bank processing delays, as the bank adds a new authorization and is in process of voiding the old authorization.
What happens if the re-authorization fails?
If the re-authorization fails, it typically means that the shopper does not have sufficient funds or there is an issue with the payment method initially provided. Therefore, TryNow captures on the original authorization to ensure that we do not completely lose out on funds to charge before the original authorization expires. This reduces risk for the merchant so that we can ensure there is always an authorization that we can capture on.