Relevant documents can be anything that will help prove your case. Turn in the documents to the court or hearing's office - turn in the documents itself and not a summary or description of it.
Examples of Documentary Evidence:
Photographs before and after
You should call the court or hearing office and ask them how you can formally bring in documents to use or how you can introduce exhibits. You will probably need the original documents for the court and 2 copies for yourself and your opponent. It may hurt your case if you do not produce supportive evidence that you may have or can get.