Legally I think a resignation is valid upon delivery. CCing the new employer on a resignation email that specifies the effective date should solve your friend’s dilemma. OTOH if he continues to accept payments it would be an acknowledgement of continued employment - which the new employer wouldn’t know about but could be used by the previous employer if there’s ever any sort of legal dispute in which his exact end date is important.
I think the move would probably be to send the letter, begin new employment, and then set aside any further payments they receive from the job they resigned from for reimbursement. On the other hand, have fun with the nightmare of returning the funds to the FDA, and also tax season and…yeah nevermind fuck that.
Legally I think a resignation is valid upon delivery. CCing the new employer on a resignation email that specifies the effective date should solve your friend’s dilemma. OTOH if he continues to accept payments it would be an acknowledgement of continued employment - which the new employer wouldn’t know about but could be used by the previous employer if there’s ever any sort of legal dispute in which his exact end date is important.
I think the move would probably be to send the letter, begin new employment, and then set aside any further payments they receive from the job they resigned from for reimbursement. On the other hand, have fun with the nightmare of returning the funds to the FDA, and also tax season and…yeah nevermind fuck that.