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Can you recognize the signatures of two contracts seven years ago?
The signature of the contract can be authenticated, only the approximate time.

Formally, a signature is a trace formed on a document by the signer using a writing tool. With the passage of time, the ink used for his signature will have corresponding physical and chemical changes. By detecting the degree of change, we can know an approximate formation time.

However, due to the limitation of the existing detection technology or means, there will be some error between the detection results and the actual formation time, and the general error is 2 to 3 months.