Parent and patta documents for a flat

What are parent documents?
The Sale Deed or other document under which a person derives title is known as “Title Document”. All earlier documents that indicate the title of the persons who are predecessors in interest establishing the flow of title up to the present purchase are known as “Parent Documents”. In order that a title is clear, both the present title deed and parent documents have to be in order.
Is Patta issued for flats?
Generally, as undivided shares of land are sold to the Purchasers, Patta is not issued for undivided shares of land. The non-issuance of Patta in these cases will not affect the title if the same is otherwise in order. However, in certain cases and where practicable, there are instances of all the co-owners of a complex obtaining joint Patta.
What does sale of Undivided Share of Land mean?
There are many purchasers in an apartment complex. The size of the apartments may also vary. An undivided share of land is the proportionate share, which a Purchaser should own and possess in order to acquire ownership for his or her apartment. There are various methods of calculation of this undivided share. Generally, the undivided share being purchased must match the approved FSI as per approvals granted by authorities. This is transferred by means of a Sale Deed to enable the Purchaser to hold that share to have a registered document of title relating to the same. The undivided share will be an important factor to be taken into account in case of demolition of entire complex and redevelopment of the same and other similar circumstances, to work out the rights of the purchaser.