What if instead of releasing offer , company releases appointment letter subject to joining on or before a given date to candidates ( considering lots of non joiners and candidates shop for offers , after getting selected by 1 company) - only after selected candidate has already resigned and is serving notice period
Considering that the appointment letter is actual contract of employment once signed , both sides have legal obligations, companies will not be able to retract offer while candidates will actually join .
My question is will such practice be considered legal considering appointment letter of current company is still valid , till the last day of notice ?
What can be the alternatives ?