Why is it difficult to distinguish the signatures of people around you after work?

The more scribbled and complicated the signature, the more difficult it is to forge. Real signatures are generally smooth strokes (regardless of beauty and ugliness) and fast endings (except for people who hardly write). False signatures are dull and sticky, and the ink thickness of different segments of the same stroke is uneven. Defects in corners and folds are usually obvious. Sometimes if a pen is not well written, it will be gilded and added in the same position, so shattered glass will always be like this.