General judicial expertise only accepts the entrustment of the court, not individuals, so you can apply to the court and choose a qualified appraisal institution. At the same time, the documents that need to be identified should also be submitted.

According to the characteristics of people's writing skills and habits, as well as the reflection in writing handwriting and painting, writing can be distinguished. 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.

Extended data:

In the process of imitating other people's names, a normal person will hesitate, and his actions will be affected in the process of thinking. If we write someone else's name, this feature will definitely appear. No matter how high the imitation is, it will definitely leave traces.

There are always some problems with some details, such as writing and turning. But most of them are consistent, and the biggest feature of copywriting is its shape. When laymen and ordinary people look at it, they think I signed it.

However, in the researcher's view, first of all, it will be determined that this imitation is conditional, for example, the imitator has the file of the imitated person as a reference sample. When each of us signs, no matter how it changes, it will leave a pattern.

When the strokes are naturally smooth, or when writing is in a hurry, and when the strokes turn, everyone will leave different characteristics, which is the core that handwriting appraisers should grasp. Through these things, we can use years of experience to judge the authenticity of handwriting.