The application for appraisal needs to be made during the period of giving evidence. Take the handwriting that needs to be authenticated and the real handwriting, and entrust the judicial authentication institution to compare the authenticity through judicial authentication.
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.
At present, for forgery, it is very accurate to identify the time of handwriting formation by Raman spectroscopy, which can be identified basically in more than 3 months.
Handwriting features that have been proved and widely used in identification mainly include the following contents: written language features, text layout features, calligraphy level features, font features, writing features, typo features, stroke order features, collocation ratio features, comparison marks features, punctuation and Arabic numerals features, and verve features.