Requirement to furnish patta for the settlement of property

There is a settlement which is planned between 3 siblings for which the buyer sibling is asking for Patta, Death certificate of the father,legal heir certificate. X is one sibling, Y was a minor at the time of purchase of the land and they have joint property in their name without a patta. They are planning to transfer the property to brother Z as settlement of property so that Z can sell the property to Buyer brother 'A'.My questions are:1. Is it necessary to furnish a patta(at present no patta for the land property) to the buyer if there is a settlement? If so who should take the patta, is it the joint owners, or the 'Z' to whom the property will be transfered?2. Can owners(X/Y) transfer the property from their name to Z without getting a patta?3.Where can I find a survey no and a subdivision no in the sale deed?4. What is the procedure to transfer a property (settlement)?Plz note that 'Y' was a minor at the time the property was purchased, but X/Y has joint property in their name.