fingerprints and signatures are valid only if they are original. Fingerprints and signatures on photocopies are generally invalid. According to the relevant regulations, if the parties conclude a contract in the form of a contract, the contract will be established when all the parties sign, seal or fingerprint it. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.

Fingerprint, also known as handprint, can be divided into broad sense and narrow sense: the narrow sense refers to the mastoid line pattern on the skin of the first palm of a person's finger; Fingerprints in a broad sense include finger prints, knuckles and palm prints. Fingerprint and fingerprint are literally different, that is, fingerprint refers to the mastoid line pattern on the palm skin of the first finger, and fingerprint is the imprint left by this mastoid line pattern. However, in judicial practice, it is established that the concepts of fingerprint and fingerprint are universal.

fingerprint forensics, including fingerprint search and discovery. The search scope of fingerprints is as follows:

1. Criminal activity center;

2. The entrance and exit of the site and its surroundings;

3. Articles that criminals may have come into contact with;

4. Various weapons and articles left by criminals at the scene.

Fingerprint identification, because fingerprints meet the following two conditions:

1. Fingerprints are different, and no two fingerprints are exactly the same. Although identical twins are highly similar in pattern, their detailed features are not exactly the same, but there are some differences (see Figure 1 for features). In addition, a person's fingerprints of different fingers are also different.

2. In principle, a person's fingerprint is lifelong. When children grow up, fingerprints are only enlarged and thickened, and their features such as grain shape and number remain unchanged. :

Interpretation on Several Issues Concerning the Application of Laws in Handling Criminal Cases of Infringement on Citizens' Personal Information Article 11 If citizens' personal information is illegally obtained and then sold or provided, the number of pieces of citizens' personal information shall not be counted twice.

if the personal information of the same citizen is sold or provided to different units or individuals respectively, the number of pieces of personal information of the citizen shall be calculated cumulatively.

the number of pieces of personal information of citizens in batches shall be directly determined according to the number seized, unless there is evidence to prove that the information is untrue or repeated.