After being signed off for 2wks, I am due to return to work tomorrow. I have delayed writing my resignation letter because I hoped that I would be able to go back on Monday and I would be fine. After spending the morning in tears and unable to focus on anything, I know that is not going to be the case. Is what I need to know is can I simply write - Please accept this letter as notice of my resignation - or do I need to put the date I will be leaving? (this will be 30th April as per T&Cs of teaching contracts. Will they know that this will be when I leave, or do I need to spell it out to them and state my last day in the school will be 30th April 2019. I am trying to avoid that, as it is highly likely I will be signed off again. Thanks.