You have posted that:
"But isnt the way of asking to sign at the last moment like deceiving the employee?"
If you decline to sign at the so called Last Moment then what are the penalties to be suffered say ......................VISA Cost (actual or as determined by Company)? Is there a published document on it?
A correct answer may help!
You were in which state?
The Redg. office of the company is in which state?
How many persons are employed in the company?
If company has accepted resignation then has it supplied FnF statement showing recovery of so called Notice Pay of 12 months @ Basic pay (computation of leave encashment/Bonus/Gratuity/OT/earned wages,etc), service certificate,relieving letter,Form16,PF a/c slips of all years,?
Or have you demanded all of these docs?
If not by FnF how has company demanded payment of notice pay: verbally or in writing:: and how by cheque/DD/cash?
Has it denied to issue any doc until you pay?
Have you registered with NSR/NASSCHOM?
It seems that you shall have to agitate thru an able labor Law Consultant/Service matters lawyer/law firm and you should spend quality time in person with your counsel.
The able counsel even employee's union/Trade Union leaders.....................may apply their skills:::: arbitration,negotiation,conciliation and matter may be resolved.
It is easier for united employees.
However normally companies do not like to give up...................fearing that it may set a precedence.
However it is not impossible too, thru parleys with seasoned counsels.
Otherwise court of law is an option for company and employee.
You may reply pointwise and let us see if more inputs are possible.