It is important to know that when you have a signature or any type of document that you believe is forged or in question you should not make any marks on the document. Documents submitted for examination must not be altered by you in anyway, check marks, circles, strikeouts and other marks can cause the document to be rejected as evidence by the court. Original documents are preferred as they may provide more information than a copy. For example, the pressure applied when writing can be seen and felt on the original. Original documents are not always available, they may have been lost or destroyed. Document examiners must often work with copies and are able to provide conclusive opinions and testify in court.
When providing a questioned document for examination be sure to provide the best quality copy available.