Gratuity pay eligibility for one day gap - they asked me to resign and rejoin in the same day to avoid appraisals

Dear,
Bharath Ganapathy,
In my opinion there's no problem you have strong point, i will suggest to you hire a advocate for same. also mention at that time employer had taken forcefully resign to avoid/forfeited gratuity amount.
Your case is strong so can can fight.
For any assistance you can communicate with me without any hesitation.

Dear,
Bharath Ganapathy,
In my opinion there's no problem you have strong point, i will suggest to you hire a advocate for same. also mention at that time employer had taken forcefully resign to avoid/forfeited gratuity amount.
Your case is strong so can can fight.
For any assistance you can communicate with me without any hesitation.

The facts of your case indicate that you will be eligible for gratuity.
"due to business decision Centers has been closed and asked to change department internally'
This can be substantiated by the fact of closing some centres- which is a business decision and you joining back on same day.
Pl file a claim with the company and wait for their answer.
Emails of the company will be helpful
Typical techniques to deny gratuity.