Not the most glamourous of subjects, but... Yesterday, out of the blue, I got a letter from HMRC telling me that according to their records (err..I thought they'd lost them all), for the whole of the financial year 2005-06 (yes, nearly 3 years ago) I didn't pay any NI contributions and that I now owe them £XXX.xx. I'm not self-employed and my NI contributions come straight out of my salary. I now need to provide proof of my payments and they've given me a form to fill in. Has anyone else ever had one of these letters? Are they just trying to fill in the blanks for all the data they lost a few months back? Why hassle me and not my employer? Guess I'll have to dig out the P60 for that year.