Handwriting examination—forensic handwriting expert in Kraków
Introduction
Forensic handwriting examination (handwriting identification) constitutes a specialised field of forensic examination aimed at establishing who made a handwritten entry and assessing the authenticity of documents. In criminal, civil and administrative proceedings, handwriting examination is used particularly where the origin of a signature, manuscript or set of initials is disputed, or where forgery is suspected (including imitation, alteration or disguised handwriting).
Methodologically, handwriting examination is based on analysing graphic characteristics and a comparative procedure in which questioned material is compared with comparison material. Handwriting variation resulting from external and internal factors affecting the writer is taken into account, influencing both the selection of material and caution in drawing conclusions.
1. Methods of forensic handwriting identification
The handwriting examination literature presents a broad spectrum of research methods, including comparative, descriptive, geometric, measurement-based and statistical approaches. A systematic classification distinguishes, among others, the calligraphic (calligraphic-comparative), signaletic and photographic-descriptive methods, Langenbruch’s method, the graphometric method, Matveyev’s method, variability analysis, Duyster’s straight-line system, Brosson’s geometric projection method, geometric-structural examination (geometric figures), and methods for statistical verification of examination material.
Within identification methodology, particular importance is attached to the graphic comparative method, for which guidelines have been developed on collecting comparison material, the stages of examination and documenting actions in the opinion, including the requirement to illustrate findings with visual material, such as comparisons of shared and distinguishing characteristics.
2. Examination material in handwriting expertise
Handwriting examination is based on examination material comprising handwritten entries fixed in a physical form. It is divided into questioned material (disputed writing) and reference material (standard writing), which is used for comparative assessment.
Questioned material is generally created outside the control of the procedural authority and the expert, and its quality depends on the writer and the conditions in which it was produced. Comparison material, in turn, should be selected to ensure comparability with the questioned material, particularly as regards the type of handwriting or signature, writing instrument, writing surface, and the timing and circumstances in which the samples were produced.
For questioned material, attention is drawn to the identification limitations of abbreviated signatures or initials. Such signatures may contain no individualising characteristics or too few of them, justifying a decision not to undertake comparative examination and a statement in the opinion of the limitations arising from the material's negligible identification value.
Irregularities in obtaining signature comparison material include collecting numerous signatures on a single sheet without supervising the process, which may encourage carefully drawn signatures and the disguise of signature characteristics. The literature suggests that the minimum number of comparison signatures required for examination may be around 20, although this depends on the type of signature and the quality of its graphic features.
3. Stages of forensic handwriting examination
Handwriting examination methodology proceeds in stages. Methodologically, these are preliminary examination, detailed examination and examination documentation.
3.1. Preliminary examinations
Preliminary examination assesses the material’s suitability, including its completeness, quality, legibility and comparability with the reference material. At this stage, it is determined whether the material permits comparative examination and whether the reference material needs to be supplemented.
3.2. Detailed examination
Detailed examination involves analysing graphic features and comparing questioned material with reference material. The analysis covers both structural and formal elements and execution features associated with the motor aspects of writing. An important component is the simultaneous assessment of recurring features and the range of permissible variation, taking into account the conditions in which the writing was produced.
3.3. Examination documentation
Examination documentation records the course of the analysis and enables procedural scrutiny of the opinion. It includes a description of the material, methodology, tools and actions, together with the characteristics on which the conclusions are based. The graphic comparative method emphasises the need to illustrate findings with visual material.
4. Evidentiary value of a handwriting opinion
A handwriting opinion constitutes expert opinion evidence assessed by the procedural authority. Its value depends on the quality of the examination material, the correctness of the methodology, the logical coherence of the reasoning and the completeness of the documentation. Where the material is limited, it is essential to disclose those limitations in the opinion and formulate conclusions appropriately within the limits of the material's identification potential.
Summary
Forensic handwriting examination is an identification procedure based on analysing and comparing the graphic characteristics of handwriting. From a methodological perspective, the key factors are the selection and quality of the questioned and comparison material, the stages of the procedure (preliminary examination, detailed examination and documentation), and a transparent account of the grounds for the expert's conclusions. The reliability of an opinion depends both on the method used and on the limitations arising from the characteristics of the material and the way comparison samples were obtained.
References (APA 6)
Całkiewicz, A. (2009). Kryminalistyczne badania patologicznego pisma ręcznego [Forensic examination of pathological handwriting]. Warsaw: Wydawnictwa Akademickie i Profesjonalne.