Preauthorization is a practice that allows a merchant to verify that a card is valid and that a specified amount of funds are available on your account. Preauthorized amounts are typically held on your account until the actual transactions are processed. Gas stations commonly preauthorized funds from your credit/debit card account prior to the actual charge being placed.
Preauthorizations fall off of an account within 3 – 7 business days.
Preauthorizations cannot be disputed.