Forensic handwriting examination is a specialised field of forensic expertise that aims to establish the authorship of handwriting or a signature by analysing its graphic characteristics. Modern handwriting examination relies primarily on the graphic comparative method, although supporting methods are also used in practice, including measurement methods and techniques for computer analysis of handwriting features. Such examinations are performed by a forensic handwriting expert in Kraków, who prepares opinions for courts, prosecutors, the Police and parties to civil and criminal proceedings.
Examinations of this kind include, in particular, assessing the authenticity of signatures, identifying the writer of a manuscript and evaluating possible alterations to documents. Expert practice frequently involves examining signatures on contracts, wills, financial documents, employment records and other documents of evidential significance. In such cases, handwriting analysis by a forensic handwriting expert can establish whether a signature was made by the named person or may be a forgery.
Technological progress in forensic document examination has led to the development of computer methods for handwriting analysis that support experts by enabling precise measurements of graphic handwriting parameters. Modern software tools can analyse numerous handwriting characteristics simultaneously, significantly increasing the accuracy and objectivity of handwriting opinions.
Detailed information about the scope of services is available at:
Handwriting examination—forensic handwriting expert in Kraków
The graphometric method in forensic handwriting examination
The graphometric method is one of the classical methods of handwriting examination. Edmond Locard is widely regarded as its originator, although Pierre Humbert and Persifor Frazer also made significant contributions to its development. The method assumes that human handwriting has specific geometric proportions between letter elements that remain relatively constant regardless of the writing’s size or slant (Całkiewicz, 2009).
The basic assumption of graphometry is that the size relationships between elements of a person’s handwriting do not change substantially, even when the handwriting is disguised or the letter size changes. This allows characteristic proportions in a particular person’s handwriting to be detected. Methodologically, graphometry attempts to describe graphic features quantitatively, thereby seeking to increase the objectivity of identification examinations.
In examination practice, the graphometric method involves a series of geometric and statistical measurements of handwriting elements. The parameters most frequently analysed include:
- linear dimensions of individual letter elements,
- curvature of arcs and ovals,
- slant angles of graphic elements,
- character height-to-width proportions,
- spacing between letters and words,
- statistics of breaks between handwriting elements.
The first stage of the examination involves detailed measurements of these parameters, followed by the calculation of average values for individual characteristics. The results can be used to create a characteristic graphical curve describing the structure of a person's handwriting. The final stage compares the curve derived from the questioned material with the curve obtained from the comparison material. Agreement between these curves may indicate that the handwriting under examination was produced by the same person (Całkiewicz, 2009).
However, the graphometric method is very labour-intensive and requires a large number of measurements. The literature indicates that several dozen different measurements of numerous handwriting elements are necessary to obtain a reliable result. For this reason, classical graphometry in its traditional form was not widely used, and its practical significance increased only with the development of computer-assisted handwriting examination.
GRAPHLOG—computer support for graphometric examinations
Developments in computer technology have led to specialist tools that support handwriting analysis. One of the most important systems of this kind in Poland is GRAPHLOG, developed at the Prof. Jan Sehn Institute of Forensic Research in Kraków in cooperation with CYBID (Dziedzic, Fabiańska, Kunicki, & Zadora, 2008).
The GRAPHLOG system can perform a very large number of precise measurements of handwriting features and analyse them statistically. This makes it possible to obtain results quickly concerning the geometric parameters of handwriting, which can then be used to identify the writer. The program enables not only selected characteristics to be measured, but also their numerical and statistical evaluation, which is important for making the expert's reasoning more transparent.
In handwriting examination practice, GRAPHLOG is primarily used for:
- measuring proportions of letters and their elements,
- analysis of the graphic structure of written characters,
- comparing geometric parameters of different handwriting samples,
- visualising examination results in tables and charts,
- documenting some expert findings in a more objective manner.
Programs of this kind are tools that support the expert’s work. Their purpose is to improve measurement precision and facilitate the analysis of large amounts of graphic data, rather than replace the expert. The literature emphasises that computer-assisted handwriting analysis brings a new dimension to handwriting examination because it enables numerical parameters to be used in feature analysis, thereby increasing the objectivity of identification examinations (Fabiańska, 2009).
The practice uses specialist GRAPHLOG software, allowing classical handwriting expertise to be combined with a modern measurement-based approach. This is particularly important in cases requiring precise signature analysis, comparison of numerous samples of examination material or clear documentation of an opinion for evidentiary proceedings.
The significance of computer-assisted handwriting analysis in expert reporting
Introducing computer tools into handwriting examination is an important stage in the development of forensic document examination. Computer-assisted graphometry allows handwriting features to be analysed quantitatively rather than solely described. This increases examination objectivity and reduces the influence of the expert’s subjective assessment.
Computer systems enable analysis of both the geometric features of handwriting and its graphic structure. The result is a more detailed picture of a person’s handwriting, which can be used to identify the writer of a document. These tools are particularly valuable in cases requiring comparison of large numbers of signatures or analysis of material containing subtle differences that are difficult to detect through observation alone.
Computer-assisted methods do not, however, remove the need to follow the principles of classical handwriting examination methodology. Assessing the quality of the questioned material, selecting suitable reference material and interpreting the identified features in the context of natural handwriting variation remain essential. The computer therefore strengthens the expert examination’s technical foundation rather than replacing the expert’s assessment.
This has significant evidentiary importance in criminal and civil proceedings. The clearer, more logically structured and better documented an analysis is, the more useful it is to the court, prosecution service and parties to the proceedings. Computer tools such as GRAPHLOG should therefore be regarded as a means of raising the standard of an expert’s work, particularly in highly complex cases.
Handwriting examination in a forensic handwriting expert's practice
In forensic expert practice, handwriting examinations involve analysing signatures, manuscripts and other graphic entries to establish who wrote them or detect possible document forgery. The analysis may concern signatures on contracts, wills, official documents, financial documents and employment records, as well as entries made during criminal proceedings.
Professional handwriting examinations conducted by a court expert include analysing individual handwriting characteristics, comparing questioned material with comparison material and preparing an expert opinion for the court, prosecutors, the Police or parties to proceedings. In forensic terms, the principal aim is not to describe the writer's psychology, but to identify the person who produced the handwriting or establish whether a signature was forged or a document's content altered.
Detailed information on the possibility of conducting these examinations is available at:
Handwriting examination—forensic handwriting expert in Kraków
The forensic handwriting expert’s practice uses both classical forensic methods and modern computer tools to support handwriting analysis. In particular, graphometric analysis uses the specialist GRAPHLOG system, which enables precise measurement of handwriting parameters and their statistical analysis.
FAQ—handwriting examination for the Police, prosecution service and judicial proceedings
What does a handwriting examination for the Police or a prosecutor involve?
A handwriting examination for the Police or prosecution service involves forensic analysis of signatures, manuscripts or other graphic entries to establish who wrote them, detect a forged signature, identify imitation or assess a document’s authenticity. The examination uses methods applied in handwriting identification, including the graphical comparison method and, where justified, computer-assisted measurement techniques.
Which documents are most frequently submitted for handwriting examination?
In expert opinion practice, the most frequently analysed items are signatures on contracts, wills, powers of attorney, financial documents, receipts, employment records, procedural statements and other documents of evidential significance. Examinations may also cover anonymous letters, handwritten notes, additions, corrections to document content and signatures disputed by parties to proceedings.
Can the authenticity of a signature be examined?
Yes. One of the fundamental tasks of handwriting examination is to establish whether a signature was made by a specific person or may be the result of forgery, imitation or another form of interference. Such an assessment requires comparison of questioned material with suitable reference material and a detailed analysis of the signature’s individual features.
Does GRAPHLOG software replace the expert?
No. GRAPHLOG is a specialist tool that supports an expert's work. It enables precise measurements and statistical analysis of measurable handwriting characteristics, but the final assessment of the examination material, interpretation of results and formulation of conclusions belong to the expert. The program increases the precision and transparency of examinations, but does not replace expert knowledge.
Can handwriting examination be used in a criminal or civil case?
Yes. A handwriting examination opinion may serve as evidence in criminal, civil, administrative or employment proceedings. In practice, it is used both by courts and prosecutors and by parties commissioning private opinions to protect their procedural rights.
Where can handwriting examination be commissioned in Kraków?
Handwriting and signature examinations can be commissioned from a forensic handwriting expert in Kraków. Information on the services offered, the types of documents examined and contact options is available at: handwriting examination—forensic handwriting expert in Kraków .
References (APA 6)
Całkiewicz, A. (2009). Kryminalistyczne badania patologicznego pisma ręcznego. Warsaw: Wydawnictwa Akademickie i Profesjonalne.
Dziedzic, T., Fabiańska, E., Kunicki, M., & Zadora, G. (2008). Graphlog – komputerowy system wspomagający badanie cech pisma ręcznego. In Z. Kegel (ed.), Wpływ badań eksperymentalnych na wartość dowodową ekspertyzy dokumentów. Wrocław: University of Wrocław.
Fabiańska, E. (2009). Postęp w badaniach pisma ręcznego i dokumentów. In M. Kała (ed.), Postępy w naukach sądowych: W osiemdziesięciolecie powstania Instytutu Ekspertyz Sądowych im. prof. dra Jana Sehna [Advances in forensic sciences: marking the eightieth anniversary of the Professor Jan Sehn Institute of Forensic Research]. Kraków: Institute of Forensic Research.