Forensic examinations performed by government-authorized experts provide a scientific determination of whether a stamp on a document matches the registered official seal. Judicial appraisal of seal impressions is a critical component of commercial litigation in China, where the validity of a contract often hinges on the authenticity of the chop. The process involves comparing the disputed mark with a known genuine sample or the digital record held by the public security bureau.
These experts look for microscopic details, including the spacing of characters, the thickness of the lines and the specific flaws in the carving material. The findings of the appraisal are presented in a formal report that serves as primary evidence in a court of law. This procedure applies to cases of suspected forgery, unauthorized seal usage and disputes over old contracts.
It stops applying once the parties agree on the authenticity of the seal or the court reaches a final verdict based on other evidence.
Technical experts use high-resolution imaging and specialized software to identify the unique “fingerprint” of a physical stamp. During the judicial appraisal of seal impressions, the examiner checks for minute variations in the ink distribution that occur due to the pressure applied during the stamping process. They also look for wear and tear on the seal’s surface, such as small chips or scratches, that develop over time and are unique to that specific tool.
The 13-digit code is examined under magnification to ensure that the font and the alignment of the numbers match the official standard. Even a high-quality laser-carved counterfeit will often show subtle differences in the edge sharpness of the characters when compared to a genuine seal. This level of detail allows the appraiser to determine with a high degree of certainty whether the impression was made by the same physical object that is on file at the police station.
Chemical evaluation of the pigment used in the seal impression can provide clues about the timing and the location of the signature. For a judicial appraisal of seal impressions, the appraiser may perform a spectroscopic analysis to identify the specific brand and type of ink used. If the ink on a document dated five years ago is a modern type that was not available at the time, the document is likely a backdated forgery.
The color and consistency of the ink are also compared against the ink pads typically used in the company’s offices. Variations in the chemical composition of the ink can indicate that the seal was applied in a different location or by someone outside the organization. This information helps the court understand the context in which the document was created and whether it follows the normal business practices of the company.
Formal rules governing the collection and handling of evidence ensure that the results of the forensic test are admissible in a trial. The judicial appraisal of seal impressions must be conducted by an institution that holds a valid license from the provincial department of justice. Both parties in a dispute usually have the right to be present during the sampling process to ensure that the genuine seal is not tampered with.
The original document containing the disputed seal must be transported in a secure manner to prevent any alteration of the impression. If the appraiser finds that the document was tampered with, such as the seal being applied over a pre-printed signature, this fact must be clearly stated in the final report. The integrity of this process is what gives the court the confidence to make a ruling that could involve millions of dollars in liability.
A well-conducted appraisal often leads to a quick resolution of the case as the parties are presented with indisputable physical evidence.
PSB seal recordation binds corporate authority through a 13-digit code, overriding signatures unless fraudulent creation meets explicit civil code standards.
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