ObjectiveThe convenience of modification and duplication of electronic documents has made determining their origin and authenticity a significant challenge in judicial forensics. Utilizing the patterns of Revision Identifier (RSID) for document verification holds potential value. Therefore, it is crucial to explore the variation patterns of RSID in OOXML documents, expand the theoretical foundation, and address the limitations of existing verification methods.MethodsBy simulating various Chinese word processing environments, experiments were conducted to analyze the generation and variation patterns of RSID in OOXML documents across different software versions and application scenarios. General patterns of RSID generation and variation were summarized, and their forensic values were revealed.ResultsRSID exhibits certain patterns across different word processing software. Similarities and differences in RSID generation rules were observed across different software programs, and these patterns can assist in determining the origin and authenticity of documents to a certain extent.ConclusionRSID provides a new approach to authenticity verification for OOXML documents, offering significant theoretical and practical values. It serves as an important reference for researchers engaged in electronic document authentication.