Notice period & resignation

Has the new employer Y asked to sign an affidavit asking for previous experience? If yes then you need to mention about X and if you don't it would be concealment and invite discplinary action.

Service certificate has to be issued to all employees.

Releiving letter signfies nothing is pending against employee.

You may obtain acceptance of resignation, FnF statement shwoing all payables by company to you, adjustment of notice pay, leave encashment,bonus, etc, Form 16, PF a/c slips of all years, salary slip of all months, NOC/NDC, acknowledgment of handing over of charge etc....................from X.