I'm a lawyer, here's what you need to do -
Send a very very polite email from your personal mail that thanks the company for all they've done for you, mentions the day you've resigned and the FNF you're expecting
Tell them you'll appreciate if the FNF is cleared asap and are looking forward to the future and wish them all the best
Do NOT answer any calls or messages from work, don't answer any emails that say anything to the contrary
If your fnf hasn't been cleared in another week or so, send a polite reminder, that's it
Don't worry about anything at all, as a senior person in the company, you of all people would know, no one goes for law suits like these