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by LogicX 4891 days ago
Mine is a 10-digit pin, of my choosing.

When dealing with 'foreign' ATMs (whether domestic or foreign), my pin is sometimes truncated -- anywhere from 8 to 4 digits.

I've also come across ATMs where it won't work.

Bank of America advises you to change it to a 4-digit PIN before traveling internationally (and actually have a paper handout they'll give at the teller window saying such if you tell them you're traveling internationally.