You have clarified that you have already submitted representation and reminder to the good office of your VP, and that this VP has chosen to maintain a studied silence and thus has taken a stand that he/she shall neither declare that forgery is committed nor order an enquiry with a copy to you nor declare the result of inquiry of this unfortunate episode.
You may submit a representation to examine your personnel file maintained with company. Let the company either reply or maintain a studied silence on this also.
Do you mean that you have not lodged your claim, but the company shall pay you the gratuity, and PF amount? If it happens you may decline. You should not submit your claim on both.
If you are fighting forged resignation then which payment and claim you wish to fight?
If the company has chosen to enact the forged resignation, company has to supply you all the dues payouts and certificates/documents in time. If the company supplies you the termination order instead, you may protest and refuse to accept FNF statement citing errors, termination order and if at all you encash payment instrument you may do so lodging your protest under acknowledgment.
The forum has not seen copy of your communications, to your company. You may approach an experienced and competent lawyer/law firm at your location. Your lawyer can fine tune and structure your future communication and build record in your favor and formulate a strategy based on the inputs you can provide. You can contact learned Mr. Thukral also, a competent LCI expert and Mr Thukral may take up your cause and take you under his wings.