Hi, I am working out my notice period but in error, my employer has already notified HMRC that I have left and I have received my P45 in the post during the week. I asked them whether I'll get an updated version when I leave but they said as they've already notified HMRC, they won't send another. Is this right and also are there any major implications if I just keep this one in terms of either my final pay or tax codes for new employer, etc...? Also, does this technically mean I shouldn't be in the office!!