When you want to make sure your customer has sufficient funds available on their credit card, you can authorize the funds. When you authorize funds for a credit card, the funds are placed on hold, and the limit of the credit card is lowered by this amount. After the authorization goes through, when you make the actual sale, you can capture the authorized amount. Make sure you do this within seven days, when an authorization typically expires. If you capture an amount that is smaller or larger than the authorized amount, you may be charged a higher discount rate.
To do this task
Open the Customer Payment - Authorization window.
When the Customer Payment - Authorization window opens, select a customer and enter the amount to be authorized.
Enter the Pmt. Method and the Card No. fields if they are not pre-filled from the customer record.
Save the authorization.
What is Merchant Service for QuickBooks?
How do I charge a card after authorization?