I used the code for the first time at LAX which verified it. They gave me a one-time courtesy and allowed it. Unless you are an Audi owner, I wouldn't gamble and drive off because Silvercar will not change codes (ie. to the visa code) upon pick-up.
If any first-time users need a referral code, use XINPMCBA (we both get $25)
Last edited by Finance_underling; Mar 7, 2020 at 7:09 pm