Abstract We are delighted to have been invited to be guest editors for this special issue on forensic document examination, a forensic science discipline that has had a long history of use in both criminal and civil investigations. The work of the forensic document examiner (FDE) can encompass handwriting (including signature) comparisons, and examinations and evaluations of physical components of questioned documents such as paper, ink, toner and impressions (of writing and stamps) to answer questions of authenticity or source. A debate regarding the validity and reliability of forensic handwriting examination and other forensic comparison techniques that rely on human cognition and decisionmaking has been ongoing for several years. Furthermore, the risk of cognitive bias in forensic science generally and forensic handwriting examination specifically has been identified in the published literature. Despite a declining reliance on handwritten signatures for business transactions, and increased use of digital technologies for both formal and informal communication, handwriting and signature comparisons and examinations of the components of physical documents still play an important role in forensic casework. It has been only in relatively recent years that significant changes to the paradigm, particularly for handwriting examinations, have occurred, with a greater appreciation of the need to understand and define the scientific basis of the work. Technological developments have led to more objective approaches to handwriting examinations, and the ability to explore in greater detail the physical components of documents. Additionally, topics such as evidence interpretation, reporting and quality assurance are as relevant as ever for the FDE. This special issue showcases research and commentary across a range of forensic document examinations and topics, demonstrating the continued relevance and shifting focus of the field.
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