Your card can be used for purchases anywhere Visa/MasterCard is accepted. Cards are not accepted at gas stations.
To use your gift card for an online purchase, register your card online with your name and address. When completing your online purchase, your billing address should match the address you’ve registered.
If you want to use your gift card for a purchase greater than the balance of the funds available on your card, you must tell the merchant to charge only the exact amount available on the card, and then you must arrange to pay the difference using another payment method allowed by the merchant. Some merchants may not accept these "split transactions". If you fail to inform the merchant prior to completing the transaction, your gift card is likely to be declined.
Need to return an item purchased on your card?
No problem. Depending on the merchant, the refund may be credited to your card or issued as a store credit or cash. You may need to present your card and receipt with the return.