I'm leaving my job for grad school but they want my resignation letter in advance.
As you know, the covid-19 pandemic has taken all businesses for a ride. I work at an academic institution where most people don't trust HR (for good reason). I am going to grad school in the fall, my manager knows because he was one of my recommenders, and now he's asking for a resignation letter or an intention letter declaring that I will be leaving at the end of the next month so that he can post my job for a new hire. He asked me this three months in advance of leaving and I gave him a hard no because that would make me vulnerable + I'd always feel like they could tell me to leave at the drop of a hat. Because the company has to get requests in by the end of fiscal year (i.e. a new hire) should I give him the letter now? Should I wait until the middle or end of this month? Or should I just give two weeks? My manager and I have a decent relationship, but you just never know peoples' intentions + HR is not trustworthy where I work.
Also- part of me is thinking that if they're ultimately planning on doing layoffs (this has not been confirmed) and I give him this letter I might not get unemployment.
Thank you so much in advance for your suggestions!!!