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As 'finnw has mentioned, almost 50% of 4-digit numbers have at least one repeated digit, so there is high chance of ending up with such a number. FWIW I have 2 UK cards from different banks where the PIN has no repeated digits. I suspect you're seeing a pattern where there is none.

Incidentally, codes with repeated digits make it harder to guess your code based on fingerprints, as there are more possible combinations.

Excellent thank you. I feared that I was but the alternative is also fairly plausible. Cheers!

4960 of 10000 4-digit numbers contain at least one duplicate. Also, the probability of getting a number that has an unusual property is, counterintuitively, as an old math joke states, 1.

http://en.wikipedia.org/wiki/Uninteresting_numbers

In Sweden I've had pins without duplicated digits.

It's called the birthday paradox :)

1/3 of mine have duplicated digits.