Rule 903 Subscribing Witness' Testimony Unnecessary

If someone signed a document as a witness, you do not need to bring that person to court to prove the document is real. There are other ways to show a document is authentic without tracking down everyone who signed it.

The only exception is if the laws of a specific place (like another state or country) require a witness to testify about that document. In that case, you would need to follow those outside rules.