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Sometimes the credit card terminal will ask especially at gas pumps for my zip code as an anti fraud measure, and will reject the transaction of you enter the wrong number. If a cashier is asking I always use 90210.

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I guess a lot of people not from the US will use 90210 when prompted for a US postal code. I can't even remember what the show was about (except that it was set in Beverly Hills, obviously), but the number stuck.

The show was called 'Beverly Hills 90210'

Just a generic teen drama

I had same issue when visiting the US. I tried some fake numbers but it wouldn't accept it (my actual postal code has letters, so that wasn't possible), so I just ended up paying by cash.

Did you try your postal code minus the letters? Afaik[1] usually only the numbers in your address are verified anyway.

[1]: https://en.wikipedia.org/wiki/Address_Verification_System

My UK postal code only has two numeric digits, whereas I seem to recall the US gas pumps require five digits. Just means you can't pay at the pump.

Post codes in Australia are just 4 numbers, so when buying subway tickets in NYC, I just put in 10000 or something (I believe that's close enough to the local code?).

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