Questioned document examination

Questioned document examination (QDE) is a term for a forensic science discipline pertaining to documents that are potentially disputed in a court of law. The primary purpose of this is to provide evidence about a suspicious or questionable document using a variety of scientific processes and methods. Evidence might include alterations, the chain of possession, damage to the document, forgery, origin, authenticity, or any other questions that come up when a document is challenged in court.