Affidavit of Identity in Thailand: Resolve a Name Mismatch

Identify the actual document request

Ask for the recipient’s wording, not just the instruction “get this notarized.” A passport copy, sworn identity statement, and correction of an official record have distinct purposes. Where the issuer recorded a wrong date of birth or name, an affidavit may not be an acceptable substitute for a correction.

• Certified copy: compares the submitted pages with the original passport; it does not certify the holder’s entire history.
• Identity affidavit: records facts stated by the deponent using the signing or oath procedure the recipient requires.
• One-and-the-Same Person statement: identifies each name, the document using it, and the explanation connecting them.
• Issuer correction: use the issuing authority’s process where a record is inaccurate or the recipient insists on amendment.

Build a document trail between the names

Use the records relevant to your circumstances. You do not need every item below, and missing evidence should never be replaced by a fabricated or backdated document.

• Current original passport and an old passport if it helps connect the names.
• The records bearing the different names, such as a birth, marriage, or education record.
• Name-change orders or marriage records where they explain the change.
• The recipient’s current form, language requirements, copy count, and submission deadline.
• Translations where needed, including any recipient-specific requirements for the translator.

Review the statement before the signing appointment

Separate your current legal name from a former name or transliteration. Identify supporting records precisely and compare passport numbers, dates, and spellings against the originals. Do not sign ahead of time if the requested procedure requires signing before the certifier.

Tell the team if you cannot read the draft language or need an interpreter. You must understand the statement you give. Notarization does not transform an inaccurate statement into a true one.

Expired passports and the pages actually required

An expired passport may help establish a name history, but the recipient may reject it for current identification. Make the purpose and expiry status clear and do not omit pages merely to conceal information.

There is no universal requirement to certify every stamped page. If a recipient asks only for the biographical page, adding unrelated pages may increase cost and disclose unnecessary personal information. Obtain the page list first.

Overseas use: distinguish the affidavit from authentication

As of 8 October 2026, the Apostille Convention is not yet in force for Thailand. HCCH gives 28 February 2027 as the entry-into-force date. Do not plan a current Thai-document filing on the assumption that Thai Apostilles are already available.

Check the present route with Thai Consular Affairs, the relevant embassy, and the recipient. After entry into force, the applicable treaty relationship and document scope still need checking. An Apostille authenticates the signature, capacity, and seal; it does not verify every statement in an affidavit.

Limits of certification and careful handling of identity data

Comparing a copy with an original is not access to an immigration database. A check of passport digits is not confirmation of authenticity by the issuing state. This page does not claim government-database access or specialist passport-forensics equipment.

Before sending copies, ask about the document channel, purpose, access, and retention terms. Share only necessary pages and avoid public posting of passport numbers or identity records. The receiving institution makes the final acceptance decision.