Expiry date is one one one two

So I've just paid my electricity bill over the phone. My electricity company has a voice recognition system in place, so instead of speaking to a real person I just followed the cues and read out my account number, card number and so on as required.

All was going swimmingly until I was asked to read out my debit card's expiry date. On the card itself this is given as '11/12' (in that format) so after a moment's hesitation I said "eleven, twelve". No dice! I then tried "November two thousand and twelve". The system grudgingly accepted this, replying with: "Your card expiry date is one one one two. Is this correct?"

Note to companies using voice recognition systems: when you ask customers for information, please tell them how to give that information.

(And note to potential fraudsters: my card's expiry date isn't actually 11/12. Probably.)