Forensic document examiners must follow generally accepted practices in their industry. This is a requirement of the courts. Industry standards are defined by ASTM International and the Scientific Working Group for Document Examination (SWGDOC).
New standards are being developed by the National Institute of Standards and Technology and the United States department of Justice under the Organization of Scientific Area Committees, OSAC. These committees supersede the SWGDOC organization which lost its funding in 2013. The purpose of OSAC is to bring a uniform science-based approach to all forensic disciplines.