Very strange! It looks like your account has only recently been closed and not in February as you thought.. I received a similar statement immediately after my official closure date of February 23rd. The only additional money out of the account was the admin fee of €38. I was in a similar situation.. fully offset etc…Got one of the standard 3 monthly statement type letters today that shows I paid 2.93 in interest! A bit confusing as if I did where did they get it from, I was fully offset and haven't paid interest in years, in fact far in excess and then I cleared it all. I can't be bothered trying to even figure it out or ring them, assume it will just go away lol