A signature is defined as a combination of rather limited letters and designs, which due to frequent use, becomes almost automatic with many writings. It is the name of a person written by his hand as a sign of acknowledgment.

A name or a mark that a person puts at the end of a document to attest that he is its author or that he ratifies its contents. Many persons who done a lot of writing transform their name. Letters become simplified or condensed, complex movement appears. This is now a signature. It is mark but this mark is now personal. It is personal combination of stroke in which it is possible to recognize the writer.