It's not my signature and fingerprints, but handwriting identification is my own why.

First of all, you should understand the basic principles of handwriting identification. Handwriting identification is to find out the stable writing rules by collecting the handwriting samples of the parties, and then compare them with the handwriting to be tested to confirm whether they are the same handwriting. Usually two isolated signatures can't be compared, because a single handwriting can't reflect the stable writing characteristics, but it's not absolutely impossible. If two people's handwriting is natural, there is no disguise, and the writing level is obviously different,

Failure to find the signer is not a reason to refuse the appraisal. If so, the will can't be authenticated? However, it is difficult. As mentioned above, because the appraisal needs to provide comparison samples, and the samples can only be used after the litigants cross-examine them in court, the appraisal institution is not responsible for the authenticity of the samples.

However, the court can also take samples according to the application of the parties, looking for uncontroversial signatures written by the signer before, such as marriage registration, replacement of identity cards, notarial certificates or house transactions, or there is evidence that the handwriting is written by the signer, which can be used as samples for identification. To overturn the appraisal conclusion, the other party must first prove that the signature above is false. If you can collect a written sample of the signatory, the court has no reason to refuse the appraisal.

Fingerprint identification:

Using the physiological characteristics of stability and uniqueness, human fingerprint is regarded as a kind of "living identity card". Moreover, due to the irreplaceability of fingerprints, the security of fingerprint identification is greatly improved. With the development of image processing pattern recognition method and the maturity of fingerprint sensor technology, fingerprint recognition method has a good application prospect in the fields of finance, public security, access control, household registration management and so on.

Handwriting recognition:

It is a special technique to identify the writer according to the characteristics of people's writing skills and habits and the reflection in writing and painting. The main task is to prove whether the handwriting on the documentary evidence is the same person's handwriting and whether the handwriting on the documentary evidence is the suspect's handwriting through the same handwriting identification test. Handwriting identification can test not only normal handwriting, but also handwriting with changing writing conditions (including writing posture, writing tools, filling, etc.). ), deliberately camouflage handwriting (including left-handed handwriting, ruler-drawn handwriting), imitate handwriting, and draw handwriting. When the same person writes with the same pen, the characteristics of pen marks can also be used to enrich the basis for identifying the writer.

legal ground

Criminal Procedure Law of the People's Republic of China

Article 48

All the materials that can be used to prove the facts of the case are evidence.

Evidence includes:

(1) Physical evidence;

(2) Documentary evidence;

(3) Testimony of witnesses;

(4) the victim's statement;

(5) confessions and excuses of criminal suspects and defendants;

(6) Appraisal opinions;

(7) Records of the inquest, inspection, appraisal, investigation and experiment;