If there is a defaced document near the signature, the signature can be used to identify the time. Defaced document inspection is based on the study and understanding of the formation and change rules of various defaced document evidence, using certain physical and chemical technical means to restore and reveal the defaced document evidence, or to determine the time of creation of the document evidence. Change the facts.
Document examination has a history as old as the use of documents to commit crimes. As early as the second century BC, there are records in Chinese history books of Emperor Wu of the Han Dynasty inspecting silk books hidden in the belly of cows and identifying the writers of the silk books. Therefore, my country is one of the first countries in the world to use document inspection technology. After the Tang and Song Dynasties, handwriting examination was widely used in investigation and judgment, and the identification of the authenticity of seals and currency also appeared.
Extended information:
The object of document inspection is various document evidence in the case. However, due to the complexity and variety of document evidence, the connection with the case and the purpose and method of inspection are different. All are the same, making the document inspection content wider and more branched. It mainly includes six major contents: handwriting inspection, speech recognition (including voiceprint identification), printed document inspection, stained document inspection, document material inspection and facial inspection. However, taking into account the actual work conditions and the particularity of some contents, voiceprint identification, document and material inspection, and facial examination are separately explained here, and the rest of the content remains unchanged.
During the appraisal, it is necessary to understand the relevant circumstances of the case, clarify the appraisal requirements, check the handwriting evidence and handwriting samples; analyze and determine whether the handwriting is normal and whether there are changes caused by disguise or other reasons; choose a handwriting that can reflect the writing of the person who wrote it. Habitual, stable and special characteristics; compare the characteristics found in the test materials and samples to find out the points of agreement and differences; make a comprehensive judgment on the causes of the points of agreement and differences; make appraisal opinions and Make a certificate of appraisal.
Baidu Encyclopedia-Handwriting Identification