Can an employee rescind a resignation?
In the U.S., most states are "right-to-work" states (sometimes known as "Right-to-get-fired" states) and almost all non-contracted employees are employees at will meaning that they can quit, with or w/o notice -- for any reason at any time -- and also that they can be terminated w/ or w/o notice at any time for any reason just so long as it isn't for an illegal reason like because they're too old, or the wrong skin color etc.... Employers can set any termination policy they want regarding severance, separation etc. Their only obligation is that they have to follow their own policy.