Generally, a judicial authentication document shall be issued within 15 days from the date of acceptance. If it is really necessary to extend the time, it may be extended to 30 days after explaining the reasons to the client. For complex and difficult cases, if it is really necessary to extend the appraisal period, it may be appropriately extended with the approval of the person in charge of the judicial authentication institution and the consent of the client. The extension period shall not exceed 60 days. The time limit for judicial psychiatric appraisal and judicial accounting appraisal may be appropriately extended, which shall generally be completed within 60 days from the date of acceptance. In the process of identification, supplementary identification materials are not included in the identification time limit. 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.