All digital evidence is identified in our forensic computing laboratory, which meets international standards. This is done by our forensic computing engineers, who have years of experience in the field, ensuring reliability and auditability, and the findings are reported in compliance with the Turkish legal system.
Signature, Document, and Graphology Examinations
With our signature, document, and graphology examination services, we detect forgery and analyze the authenticity of documents. We provide reliable results through expert reports.

Forgery in documents, frequently encountered in forensic cases, includes checks, promissory notes, bonds, subscription agreements, protocols, power of attorney, ID cards, driver’s licenses, sales contracts, and rental agreements. Changes, additions, alterations, and the authenticity of documents are crucial, as elements like letters and handwriting also hold evidentiary value.
Due to their official nature, people often forge these documents to gain financial benefits or to harm another person. Since documents, promissory notes, letters, and handwriting (graphology) serve as evidence, identifying any alterations, additions, falsifications, and verifying their originality is important.
In forensic document examination, experts compare handwriting using computer software, chemical materials, and external hardware tools. Specialists and experienced professionals examine the document without damaging it to ensure the expert report is considered evidence.
At Celsiusweb, experts prepare opinions related to signatures, documents, and graphology under Articles 293 of the Civil Procedure Code (HMK) and 67 of the Criminal Procedure Code (CMK).
Our work within the scope of signature, document, and graphology examinations includes:
- Handwriting (graphology) examinations
- Signature examinations (signature comparison, detecting the transfer of a signature to another document)
- Document examinations (checks, promissory notes, passports, driver’s licenses, ID cards, vehicle documents, etc.)
- Alteration examinations (erasures, scrapes, additions, photo changes on documents, etc.)
- Pen pressure (fullage) trace examinations
- Ink examinations
- Seal examinations
- Stamp trace examinations
- Typewriter examinations (typewriters, electric and electronic printers, computer printers)
- Banknote examinations (TRY, USD, EURO)
- Examinations of burnt and defaced documents and photos
For additional services provided by Fordefence in Forensic Sciences click here.