1) in case original documents are in possession of defendants you should have issued notice to produce the originals to the defendants .
2) if they did not produce the originals court would have permitted you to give secondary evidence .
3) if you have obtained documents from CLB you must make an application and obtain certified copies of said documents .
4) certified copies would be taken on record by court .
5) if defendants have already filed the original documents and have been marked as exhibits you dont need to produce copies of said documents