@Vivek: An advocate issues a title Certificate after conducting a search on the title of the property to be purchased and mainly the title certificate states that the property is unencumbered and has a clear, marketable title.
Also depending on the nature of the property or proposed transaction these include the sale deed, lease deed, conveyance, development agreement and the documents that estabblish the chronological chain of ownership.
Hey Priya firstly to begin with a prospective investor needs to establish whether the property on offer is leasehold or freehold, and whether it is fully or jointly owned. Next, the title papers must be reviewed.