DECIPHERING OF ALTERATIONS, ERASURES, INVISIBLE WRITING
Delicate stains due to chemical erasures are sometimes effectively proved by photography.
Alterations: A large proportion of modern blank forms of checks, drafts and other negotiable papers are made exactly as the forger desires. These examinations are performed in order to detect whether a portion of a document has been altered. Some portion rendered not easily visible or some text added. We detect the deciphering documents with specialized techniques.