In several textbooks on Forensic Graphology one finds a long list of methods that have been developed in order to help the expert in assessing the paternity of documents.
For instance Vettorazzo† lists five of them:

• the grammatomorphic (or calligraphic) method
• the graphometric method
• the graphonomic method
• the experimental method
• the graphologic method

We will not explain differences and peculiarities here.
However, it is interesting to point out the importance of the contribution of the graphological method, which is too often unnoticed or unknown even to experts in the field.
Graphology, in its capacity as the discipline that studies character based on handwriting, is totally different from Forensic Graphology, which is concerned exclusively with questions of attribution. However, some of the fundamental categories of Graphology, which have been polished and studied for the last century, turned out to be of the utmost importance for the expert witness — with no need to tamper with psychological observations.

As examples of concepts borrowed from Graphology, the most important are:

• the graphical level, which can be analysed in terms of
  • Harmony
  • Formniveau
• the tension of the trait according to Pophal
• form, seen as the result of an expressive movement.