The most common cause of duplicate charges on a card will occur when clicking the "confirm" button more than once. If you see more than one charge on your card, check the ‘My Account’ section of our site. If you do not see more than one order listed under your account, the second charge is what is known as a "Verification Hold".
Most "Verification Holds", or AVS, occur when a bank or credit card company’s files list an old address on your account. When this happens, the bank often puts a hold on the card, which should be released within 3-5 business days.