[user104658]

Originally Posted by Kizzy

How about applying the question to official documents instead, say your tax or nat ins ones? I'd say that was a better way.

Nothing is certain, except death...and taxes

Can't say I've ever filled in anything about tax or NI, though. You only really do those documents if self-employed, otherwise it's all PAYE and you never see any of it (other than on your payslip).