1. Observe the seal: the genuine seal is clear and accurate, the font is standard, the edge of the seal is clear, and there are no vague or damaged marks.
2. Check the paper: the authentic paper is thick in texture, hard to handle, uniform in color, without obvious color difference or spots.
3. Check the printing quality: the genuine printing quality is high, the font is clear, the lines are smooth, and there are no fuzzy or broken marks.
4. Check the watermark: the genuine watermark is clearly visible, and there are no vague or broken traces.
5. Contrast font: the genuine font is standard, the strokes are smooth, and there is no obvious fracture or deformation.
6. Color contrast: authentic colors are bright, and there is no obvious fading or discoloration.
7. Contrast format: the authentic format is standardized, and there is no obvious dislocation or deformation.