The $1 charge you might see is an authorization hold which will automatically disappear, and will never post to your account. Our payment processor will send your bank a request for either $0 or $1 at checkout to determine whether or not you are using a valid payment method.
Regardless of whether or not the authorization is verified, the charge will cancel on its own and will disappear within a couple of business days. Depending on your bank or credit card company, it may take a bit longer. If three business days pass and the charge is still there, you can contact your bank/credit card provider to see what’s causing the delay and they should be able to resolve it for you promptly.
Our payment processor will first attempt a $0 authorization in all cases except AMEX (which doesn’t support $0 authorizations, instead we’ll try a $1 authorization right away.) If the $0 authorization fails, then we’ll attempt a $1 authorization.