Unregistered gpa and death of the gpa exeutor

Ji, after expiry of GPA Principal (who executed the GPA), automatically the GPA will cancel.  If GPA agent executed any deed that is null and void.

You can not also claim adverse possession, as you are having a POA only and contact a local advocate for the study of the GPA document whether it is for consideration or not and whether Sec.116 of Indian Evidence Act is attracted obstructing your claim.

sir, the GPA has clear cut clauses, empowering the holder  that he can sell, mortgage, gift etc. Besides GPA, unregistered Sale Agreement and affidavit were also executed, clearly stating that GPA holder had sold the property for a valuable consideration and had handed over the possession  on that day itself.

Now, if the legal heirs can join the execution of the Sale deed, infavour of the intending purchaser, wil that be sufficient to perfect the title ?

How any one can say whether that is sufficient or not, the purchaser should be convinced ultimately.