Legal heir can register land

Dear Mr. Advocate

A person is having a legal heir note with family chart issued by Municipal Counsillor of that area on his letter head.

That person is selling a piece of land which is in the name of his Late aunty (and unty has no son/daughter, husband or any other undertake and she has died) 

Now the above person can sell this land on legal heir ground. He can register that land to us.

Or I should not purchase that land.

Please suggest

Regards

Dharmendra