How to use your Golf USA Gift Card for purchases at Buy.Golfusa.com and Participating Golf USA stores. It's easy to useGolf USA Gift Cards for purchases on Buy.Golfusa.com or in any U.S. Golf USA store. Just take it to your local Golf USA store or follow the directions below to use it online. Use your Gift Cards on Buy.GolfUSA.com Enter the 19-digit card number(s) from the back of the card during checkout. You can use up to 5 cards per order. Step-by-step details -- Select the products you wish to purchase and add them to your Cart. From your Cart, select Checkout If you're checking out as a New Customer, complete billing and shipping address information in the New Account Section. If you're checking out as a Returning Customer and you entered your username and password to begin checkout, on the payment options screen look for Use Gift Card and click On the Add Gift Cards screen enter your 19-digit card number(s) from the back of each gift card you wish to redeem and click submit. If your online order exceeds the value of your Gift Card(s), you'll need to use a credit card (or more Gift Cards) to cover the difference. If your purchase total is less than the total balance on your Gift Card(s), any unused balance will remain on the last Gift Card you entered. After making a purchase, keep your Gift Card until you receive the item and are sure it's what you want. If you return or cancel items you paid for using a Gift Card, the amount applied against your Gift Card will be credited back to your Gift Card.