When the will for the immovable property is not made by the deceased, who was then living, the property becomes "joint family property". Every co-parcener has a right to share the property. This is for your information. As far as title is concerned, it may be pointed out that when you assert that the property belongs to your father, your father at that point of time, must have entered into a sale deed. If the sale deed is available along with Index II duly issued from the Registrar of assurance, it would amount to title. Beside this, you need to know as to whether the revenue record of the property is complete. The reason is that the name of property holder is always entered into either under City Survey Record, or the record of rights i. 7/12 as the case may be. You can submit the death certificate supported by affidavit requesting the local office to enter the names of legal heirs. So the property will stand transferred in the name of all such sharers.
You are to collect the following documents:
Sale deed of the property. Index II, entry in the city survey record, or the record of rights. If any documents are lost, seek the information by way of RTI application and thereup ask for the certified copy of each documents.