Dear Friend,
I have gone through the mails, I would like to mention that your communication to the Director sounds impolite. I have already advised that there is no harm in signing advance no dues receipt with a rider 'subject to payment of dues'.
If you withdraw PF, you have to give advance receipt. Even insurance claims receipts are signed in advance.
If they do not intend to pay they will not pay. But if they are committing to pay subject to signing the receipt so be it.
Warm Regards
Bharat Gera
HR Consultant