<prompt> Human: HI folks,Normally I go over all transactions posted on my credit card after the statement is generated, but today after I came home after filling fuel, i logged onto my AMEX app on my phone and noticed that Shell had charged 85 for the fuel. Luckily I still have the receipt which clearly shows thay I filled up for 50. The transaction is still processing as it was done today only, so i marked the transaction to be monitored from AMEX website . Per amex, i can only dispute it if incorrect amount gets posted, not for authorizations.Anyone earlier faced a similar issue ? Why would Shell do it ?  <response>: This is normal. When the charge settles it will be correct. Gas stations frequently authorize 80-120 on a pay at the pump, because they dont know how much you will actually use. Then, once you close the transaction, they actually charge what you got, and the difference is released back to your credit line. It takes a few days.It really sucks when they do it to debit cards. 