

An anonymous letter can raise an important question: Can the writer be identified from the handwriting?
In some cases, forensic handwriting examination can help determine whether the handwriting in an anonymous letter is consistent with the known writing of a particular person. This is done by comparing the questioned writing with suitable known or admitted handwriting samples.
However, handwriting comparison is not simply about finding two samples that look alike. A forensic document examiner evaluates relevant handwriting characteristics, similarities, differences and natural variation before forming an expert opinion.
The process generally involves three important stages:
The anonymous letter is treated as the questioned writing. The examiner first assesses the quality, quantity and condition of the handwriting available.
A very short note or poor-quality copy may provide less information for comparison.
The examiner needs suitable known or admitted handwriting samples for comparison.
These may include genuine documents, correspondence, applications, notes or other writings that can reliably be attributed to a particular person.
The questioned writing is then compared with the known samples.
The examiner may consider characteristics such as:
The assessment is based on the overall combination of relevant characteristics rather than one isolated feature.
Handwriting examination can provide an expert opinion regarding authorship, but it should not be described as an automatic or guaranteed identification.
A person’s handwriting can naturally vary from one occasion to another. Writing conditions, the writing instrument, surface, speed and intentional disguise can also affect the appearance of handwriting.
For this reason, the examiner considers both similarities and differences between questioned and known writing.
The final opinion depends on the evidence available for examination.
For an anonymous letter examination, the following may be useful:
Original documents are generally preferable because copies may lose some details during reproduction. Hiral Mehta’s existing guidance also recommends providing questioned documents along with known or comparative documents for examination.
Most of the time, yes.
The quality and generation of the copy are important. A clear copy may preserve useful handwriting characteristics, while repeated photocopying, poor scans or low-resolution images can reduce the information available for examination. It also depends on the features of the handwriting.
If the original document exists, it is generally preferable to preserve it and have the original examined.
A person may intentionally change their handwriting when writing an anonymous letter.
They might change:
Examination of disguised handwriting is generally not as easy as regular handwriting, however it can be done in most cases.
The examiner must determine whether enough reliable characteristics remain for meaningful comparison.
Several factors can affect the examination:
Therefore, a professional forensic opinion should be based on the actual evidence available rather than assumptions.
Yes. Section 39 of the Bharatiya Sakshya Adhiniyam, 2023 recognizes expert opinion concerning the identity of handwriting as a relevant fact when a court has to form an opinion on that issue.
The provision also addresses opinions about whether documents were written by the same person or by different persons.
However, an expert opinion does not automatically determine the outcome of a legal case. Its evidentiary value depends on the examination, reasoning and material supporting the opinion.
A forensic handwriting examination may be relevant when an anonymous letter is connected with:
If the document may become relevant to a legal matter, preserve the original and avoid unnecessarily writing on, cutting, folding, laminating or otherwise altering it.
Hiral A. Mehta is an internationally recognised forensic document examiner and handwriting and signature expert in Mumbai, India.
Her services include handwriting matching, anonymous writings, signature verification and forensic document examination. For an anonymous letter, the questioned writing can be examined along with suitable known or comparative writing to assess what the available evidence can establish.
Anonymous letter handwriting analysis can help examine whether questioned handwriting is consistent with the writing of a known person. The process requires suitable comparison material and careful evaluation of handwriting characteristics, similarities, differences and natural variation.
If you have an anonymous letter connected with a dispute or legal matter, preserving the original document and obtaining a professional forensic examination can help determine what conclusions the available evidence can reasonably support.
A handwriting expert may be able to provide an opinion about whether anonymous handwriting is consistent with the known writing of a particular person. The availability and quality of comparison material are important.
Handwriting examination can provide an expert opinion about authorship, but it should not be presented as an automatic or infallible identification.
Suitable known or admitted handwriting samples are generally needed for meaningful comparison.
Yes, examination is still possible in most cases.
In most circumstances, yes. However, the quality of the copy and the features of handwriting matter, and an original is generally preferable when available.
Section 39 of the Bharatiya Sakshya Adhiniyam, 2023 recognizes expert opinion regarding the identity of handwriting as a relevant fact.
