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Forged Signatures

المؤلف:  Max M. Houck، Jay A. Siegel

المصدر:  Fundamentals of Forensic Science

الجزء والصفحة:  p528-529

2026-08-25

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Forged Signatures

Signatures are often the subjects of forgery attempts. Depending upon the circumstances, the forgery may be accomplished in a number of ways. If the signature were to be furnished on the spot as in a stolen check, forgers would attempt the forgery in one of two ways. Either they would practice it from a copy of the authentic signature beforehand and then try to duplicate the check-owner’s signature on the check, or they would just write the check freehand, with no attempt to forge the signature. Hopefully for the forger, the merchant wouldn’t pay much attention to the signature. Figure 1 shows how signatures are compared. The forgery of a document that does not have to be signed in front of someone else may be accomplished in different ways. It may be traced, for example. This could be done using transmitted light or tracing making an indented writing of the signature in a piece of paper and then retracing it. Most tracings of either type have characteristics that make them look artificial and the tracing may be apparent to the trained questioned document examiner. As with all questioned documents, the key to discovering a forged signature is collecting sufficient numbers of exemplars.

FIGURE 1 A signature comparison.