Mother document issue.

Actually, current issue is with me and my elder brother on sharing the mother document (my father and his brother partitioned document). Now, my father had partitioned his share and gave (settlement) it to me and my brother. But still the patta is in my dad's name (For the share which I got) and also the mother document is with me. Now my brother is asking me for mother document (original) to submit in court for some case related issues. So my question over here is 1. Is there any such procedure where the court will ask to submit original documents ? 2. There are chances that he might not return back the original mother document, so in such worst cases will there be any kind of issues which will affect me ? 3. Since I don't have patta transferred in my name ? In future will I face any issues while transferring patta ? 4. If he didn't return back the document, Will I be able to file any complaints ? 5. if there is any other better way ? Please suggest ? Thanks in advance..