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Text 5 photocopy examination

Questioned photocopies can be examined visually for individual characteristic "trash" marks that may be made because of dirt, scratches, and other extraneous marks on the surfaces of the drum, cover, glass plate, or camera lens of a photocopy machine. A comparison of these marks on the questioned document with those marks made by a specific machine can identify or eliminate that particular machine as the source of the document. Similarly a side-by-side comparison of two or more questioned photocopies may reveal if they are the product of a common photocopy machine. As in photocopier identification, multiple generations of copies and more than one photocopy machine involved severely limit the conclusiveness of the resulting opinions.

When the document examiner examines a photocopy to determine the genuineness of the original signature as represented by the photocopy, the examination must take into account the possibility that a genuine signature was affixed to a fraudulent document and the composite, or paste-up, photocopied. This may result in what would appear to be a photocopy of an original document bearing a genuine signature. The same may be true of any other portion of a photocopy. Photocopies can he prepared from a composite of parts of two or more documents which, when copied, can appear to be a reproduction of a single document. The resultant copy, made" from composites, may or may not display characteristics indicative of its production from two or more document sources.

Indications of spuriousness include mis­aligned typing; different fonts and font sizes; misaligned preprinted matter; incorrect vertical, horizontal, and margin spacing; "shadowing" in the joined areas; disproportionate area sizes; different preprinted material and ink densities; and missing portions of writing or printing (covered by the paste-up, too closely trimmed, or masked by an opaque fluid). The "trash marks" surrounding the signature may be of greater or lesser quantity than those on the remainder of the document. This is especially true if either the model signature or document to be used in the paste-up was itself a photocopy. The best indication of a possibly fraudulent photocopy is a claim that the original document has "disappeared" or has been "misplaced."

Even when none of these indications of photocopy forgery is present, the prudent document examiner who issues an opinion about the authenticity of a signature or an entire disputed document, when the submitted evidence is a photocopy, will qualify his or her opinion. The qualifier is a statement that the opinion is predicated upon the questioned document being a true and accurate reproduction of the original document. Many examiners go even farther by including a statement in the Report of Findings that finds the accuracy of opinions involving then employed to preserve the shadowed indentation. A combination of multiple exposures taken while moving the light source fills in the available indentations with shadow and effectively reproduce the indented writing. While such techniques are often acceptable, they lack the ability to recover invisible microscopic indentations and have an inherently lengthy processing time.