When an admin or end-user places an order within Order Hub and the total is greater than $0, we require a Credit Card to be entered and authorized for the purchase. An authorization states the cardholder has sufficient funds or the available credit needed to cover the cost of a transaction they're using a card to complete.
Authorizations will roll off once the Sales Order is billed. As the final bill of sale is the actual transaction, not the authorization.
Ex: an order is placed on 4/14, your card is authorized. The order ships/bills on 4/18 - this is the final charge, and the authorization on 4/14 will no longer appear on your statement
Note: an authorization may be a different amount than the final total due to tax differences, discounts, etc.