You have posted that:
----“ I emailed my previous manager that I will get discharge next month then will meet him but did not get any reply from him.”
It is reiterated that you should not have written it.
Only you would know what else has been submitted by you in writing.
You may put all communication in order and show it to your lawyer.
Kindly go thru the details once again and draw your strategy in consultation with your lawyer and proceed under expert advice of your lawyer.
----“I was always a top performer and worked with full dedication (maybe that’s the reason they won’t let me go).
I have seen my friends getting away with it just by submitting a simple medical certificate.”
Apply your rapport, goodwill and ensure that you get leave approved even if on LOP.
The employer/promoters/Directors/GM etc has the discretion and can pass the leave on LOP.
Your travel to abroad during period of sickness reported by you should not get leaked to the company.
““Today HR emailed me asking for medical certificates and threatened me that I will be marked absconding.”
HR has limited powers and has to follow the company policy. Against sick leave if medical certificate is not submitted HR can not admit leave and in that case as per company policy HR may have to declare you absconding. This might have been approved by higher management as well.
Abscondment is misconduct. It may lead to termination. Company may have its own internal policy to deny relieving letter in case of abscondment.
----“ I also understand that as per the law I'm at liberty to change/quit jobs whenever I want without serving the notice period, provided I clear my dues and pay for the notice period etc.”
Resignation can be without permission or notice.
Apply your rapport, goodwill and ensure that you get not just acknowledgment but acceptance of the resignation with seal and signature of official of the company on your copy of the resignation, on the spot, even if it is a handwritten comment or by email from official email id of the company on the spot.
Company does have the choice of issuing order of termination even if you submit resignation.
----“I have a good amount of incentives due in my account plus leave encashment etc. however my main concern is to get my experience/relieving letters as I worked there for a significant amount of time.”
First of all aim for getting acceptance of resignation, service certificate, relieving letter with good comments (Avoid without comments or with adverse comments).
Has the company stated about eligibility of incentives in your appointment letter, CTC sheet, and do you have the copy of incentive policy, Tgt Vs performance data/record, and confirmation of being eligible to get incentives?
Company shall encash the leave in FNF statement/settlement as per its leave policy and leave rules.
If company does not disburse incentives in FNF statement/settlement you may decline to accept FNF statement/settlement in writing under acknowledgment.
You might have noted that our stance has been pro employee.
It is reiterated that you may see your lawyer. Let your lawyer’s opinion be final on all points discussed in this thread.
You may find other threads at LCI relevant and useful e.g;
https://www.lawyersclubindia.com/forum/Termination-after-resignation-has-been-accepted-78400.asp#.UWZNqNgsHso
https://www.lawyersclubindia.com/forum/Senior-quits-during-probation-advise-required-78308.asp#.UWZPo9gsHso
https://www.lawyersclubindia.com/forum/Termination-78579.asp#.UWZSW9gsHso
Finally: Rest is upto you. You may proceed as deemed fit at your end.
Valuable advice of learned experts/members is sought.