When you place an order on the Affinity Store, we send over a request to your issuing bank for either a $0 or a $1 authorisation (different banks permit different amounts) to verify that the card is issued, and the bank will allow it to be authorised.
Regardless of whether or not the authorisation is declined, we reverse our authorisation request immediately. However, even if the bank declines the authorisation, some people may still see an authorisation for $1 on their credit card statement. This is not a charge, and it will disappear from your statement; depending on the bank, in anywhere from a few minutes to a few weeks.