This is very important. Pre-Authorization and Hold (Pending) charges are controlled and applied to consumer accounts by the institution (bank, etc.) associated with the card. These charges are not controlled by Kwik Fill. We do not place holds on customer accounts. We follow the rules and guidelines of the card associations (i.e. Visa, MasterCard, etc.) in the manner that we obtain card validation prior to turning on the gas pump.
In ordinary retail transactions where a card is used for payment, the seller knows the sale amount and charges that amount to the customer's account. When buying gasoline at the pump, the transaction needs to be pre-authorized BEFORE the pump will dispense fuel because the total dollar amount of the fuel sale is not yet known. The institution associated with the card determines that pre-authorization amount and how long it will show as "Pending" on the account. Some institutions can take 3-5 days to release the pre-authorization.
Your financial institution should be able to provide you with their policies. These are typically found in a document titled "Deposit Account Agreement" or "Electronic Funds Transfer Agreement". Credit card account documents may be called a "Truth in Lending" or a "Credit Account Agreement".
This information will not help you very much if there is a hold on your account, but hopefully you now understand why it's there, and that may help you with any conversation you might have with your bank.