Do we need to submit evidence in original in court ?

My father (plaintiff) has filed as case against his bother (defendant) regarding property dispute. Plaintiff had requested honorable court to bar him from entering premises, creating third party interest and against creating interest in the property. During the argument stage our prayer was dismissed since defendant also had papers (conveyance deed ) of the property. Since both plaintiff and defendant had the documents the case is now at a stage where we need to file evidence The question is: Do we need to file evidence in court in original? Do we need to submit our conveyance deed in original in court as evidence? Do we have a precedence where we can submit the document as court verified? How safe are original documents in possession of court?