Abstract
The determination of the timeframe in which a document was created is applied to verify the authenticity of documents in the investigation of fraud committed by using forged documents. It is known that the document aging process affects the substrate characteristics, the study of which requires physical and chemical research of document details. This article discusses the techniques employed to examine inks, pen pastes, gel, stamp ink and other materials that created the document. Knowledge of methods for determining the age of documents will help investigators, judges and lawyers better select experts and specialists, conduct interrogations, and evaluate their conclusions.
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