: How to get an international zip code entered into a credit card machine I have an international credit card that has a foreign zip code with letters in it. A vendor is complaining that he cannot enter letters into the machine.

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To expand on a comment by brhans

Something which apparently works for Canadians (with alphanumeric
postal codes) paying for fuel in the USA (where the gas pump wants a
5-digit zip code), is to just enter the numbers from their postal
code, followed by 0's. So a Canadian postal code of "A2B 3C4" would be
entered as "23400".

I can personally attest that in 2014, while living in the UK at a place with postcode* AB16 2YZ, while visiting the US I was able to get an automated gas pump to accept 16200 as the zipcode for my credit card.

Another thing I have heard anecdotally is that for non-US cards the zipcode isn't actually checked, so just use 90210 (or whatever favourite zipcode you know)

* (not actually those letters)

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You did not specify a country, but it sounds like typical US.
For international credit cards, ZIP Code checking really does not work. You can typically enter five 0s or five 9s, and sometimes whatever you feel like. The interface doesn't understand the problem, so it doesn't allow you to skip, but the software behind does.