How to Report Document Forgery in Thailand
You found a document bearing your name or signature that you never signed — do not write on the original, and do not conclude on your own that it is "definitely forged"
Chaiyaphum Office · Nationwide Thailand
For example, you discover a lease claimed to be signed by you, though you have never seen the document, and the signature looks similar but not identical
Who This Page Is For
- People whose signature or documents were used without permission
- Parties to contracts or transactions involving suspected forgeries
- Those in an ongoing dispute who have just found a suspicious document
Common Concerns and Practical Responses
I am not yet sure it is forged. Where do I start?
Keep the original untouched, gather genuine signature samples from different periods, and let an expert or the lawful process examine them
The document binds me. What now?
Consider filing a police report and possibly civil proceedings to challenge the document; the criminal case helps build evidence and lawful pressure
I fear the other side will destroy the evidence
Report as soon as possible so the inquiry officer can examine and preserve the originals under legal authority
What You Can Do Yourself
- Preserve all originals without writing or highlighting on them
- Collect genuine signature and document samples for comparison
- List the suspected documents with their origin and custody
- File a complaint requesting expert examination in the course of the case
Where a Lawyer Can Help
- Assessing the facts and the approach to handwriting and document examination
- Coordinating requests for expert examination within the criminal process
- Challenging the validity of the contract in parallel civil proceedings
Common Concerns Before Deciding
Must I wait for an expert report before reporting?
No — a complaint can be assessed preliminarily from the facts, and examination usually takes place within the case
I only have a copy, not the original. Can I still file?
Yes, but state the copy’s origin and the persons involved so the inquiry can trace the original
Will reporting affect my pending civil case?
It is not an obstacle; evidence in one case may be used in the other under the law
Frequently Asked Questions
What does the offence of forgery cover?
It includes forging and using forged documents under the Penal Code, for example s. 264, covering both official and specified private documents
Who examines whether a signature is forged?
Handwriting experts in the justice process, as ordered by the authority or the court
Is a contract based on a forged signature void?
A contract founded on a forged signature does not bind the person forged, but enforcement requires proper legal proceedings
Evidence-First Criminal Complaint Preparation
Our working approach: the facts, documents, and available evidence are reviewed first, so that the proposed complaint strategy fits the law and the evidence of each matter. This is a working method, not a promise of outcomes.
Responsibility and Working Procedure

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