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NYC Legal & Notary
NPT Notary Public Thailand
บริการแปลและรับรองนิติกรณ์

Last reviewed: · by NPT Editorial Team

Reviewed by NPT Editorial TeamEditorial & Compliance TeamEditorially reviewed
Licensed by the Lawyers Council of Thailand

Affidavit, Oath & Sworn Declaration

Sworn statements admissible as legal evidence in foreign courts and government agencies — by an authorized Notary Public.

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(0 reviews)
Starting fee
Request a quote/set
Time per affidavit
30–60 minutes
Languages
TH + EN
Court-admissible
Worldwide
Licensed Notarial Services Attorneys · Lawyers Council of Thailand

Our Team of 6 Licensed Notary Public Attorneys

An Affidavit is a written statement in which the deponent swears that its contents are true, taken under oath before a Notary Public who certifies the swearing took place in their presence. It is required when sworn statements must serve as legal evidence in foreign courts, cross-border divorce cases, insurance claims, single-status declarations, parentage confirmations, and international inheritance proceedings.

Starting fee: Request a quote/setProvided by NYC Legal & Notary Service Co., Ltd., DBD Reg. 0435567000061, Thailand.

How to use Affidavit, Oath & Sworn Declaration

  1. 1

    Contact us via LINE @Thainotary or call +66 94-895-8999 to describe the document.

  2. 2

    Send a photo/scan in advance so our attorney can review and quote.

  3. 3

    Book an appointment — at our office, on-site, or online via Zoom.

  4. 4

    Prepare original documents and ID/passport per the checklist below.

  5. 5

    Sign in front of the attorney and receive the notarized document the same day.

Most-requested affidavit types

Affidavit of Single Status (for marrying abroad), Affidavit of Marital Status, Affidavit of Parentage, Affidavit of Lost Document, Affidavit of Identity, Statutory Declarations for the Australian Department of Home Affairs, Affidavits of Support for US visas, and Affidavits of Bona Fide Relationship for fiancé/spouse visas.

How the oath is administered

1) Client drafts the affidavit (we can ghostwrite) in English or the destination language. 2) Attorney reviews for compliance with Thai law and the foreign court's accepted format. 3) Client appears in person; attorney verifies original ID/passport. 4) Attorney administers the oath; client raises hand and signs. 5) Attorney signs, applies the Notary seal, and records in the Logbook.

Real case — Affidavit of Single Status

A Thai woman marrying her German fiancé in Hamburg: the Standesamt required a German-language Certificate of No Impediment attested by the consulate. We produced the English Affidavit of Single Status, German translation, Notary seal, MFA legalization, and Embassy of Germany attestation in a single package — 5 working days total.

Business affidavits

Affidavit of Beneficial Ownership (BVI / Cayman account opening), Affidavit of Source of Funds (Singapore / Switzerland Private Banking), Affidavit of Authority (director sign-off for overseas real-estate purchases), and Sworn Statements for international arbitration.

Why work with us

Our attorneys have drafted and notarized affidavits for courts and registries in 50+ countries — every US state, Canada, Australia, UK, Germany, France, Switzerland, Sweden, Norway, Finland, Netherlands, Belgium, Spain, Italy, Japan, South Korea, Taiwan, Hong Kong, Singapore, Malaysia, Indonesia, Philippines, Vietnam, India, UAE, and Saudi Arabia.

Real notarized samples

Real client samples

Sample notarized affidavit
Sample notarized affidavit
Affidavit used for marriage registration
Affidavit used for marriage registration

Common documents handled

  • Affidavit of Single Status (overseas marriage)
  • Statutory Declaration for Australian Home Affairs
  • Affidavit of Support for US visa
  • Affidavit of Lost Passport
  • Sworn Statement for ICC arbitration

Before your appointment

  • Original Thai national ID card or Passport of the signer
  • Original document plus copies (for true-copy certification)
  • Do NOT sign in advance — signature must be made in front of the attorney
  • For companies: company affidavit no older than 30 days, with company seal
Service fee:2,000–6,000 THB
FAQ

Frequently asked questions

Is a Thai Notary Public different from a foreign Notary Public?

In Thailand, the Notary Public role is performed by ‘Notarial Services Attorneys’ licensed by the Lawyers Council of Thailand. Their certifications are valid abroad once further attested by the MFA Department of Consular Affairs and the destination embassy.

How long does the process take?

Typically 30–60 minutes per document set when booked in advance. MFA legalization adds 1–3 working days.

Can the notarized document be used abroad immediately?

Most overseas use requires three steps: (1) Notary by attorney (2) MFA legalization (3) Destination embassy attestation. We handle all three.

What is the starting fee, and are there additional costs?

Notary by attorney starts at THB 1,500 per document set. MFA legalization adds THB 200–800 government fee and THB 2,500–5,000 service fee per applicant for filing.

How can clients outside Bangkok or abroad use this service?

We deliver nationwide and worldwide. Domestic clients can ship documents by post; international clients can use international courier, with video-verified identity where permitted by law.

Where in Bangkok can I use the affidavit oath service?

We cover all 50 Bangkok districts including Silom, Sathorn, Asok, Phrom Phong, Thonglor, Ekkamai, Rama 9, Ratchada, Lat Phrao, and every BTS/MRT/ARL station, with on-site visits available.

Service Provider Information

Legal name
NYC Legal & Notary Service Co., Ltd.
DBD Reg. No.
0435567000061
Established
2009
Regulator
Lawyers Council of Thailand
Area served
Thailand + Worldwide (online)
Languages
TH · EN · ZH · JA · KO · DE · FR · ES · +30
Hours
Mon–Sun 09:00–21:00
Rating
0/5 (0)

Verified license

Registered DBD No. 0435567000061

Available

Mo-Fr 09:00-18:00

Coverage

77 provinces + 50 BKK districts + worldwide online

Quick answer (40-second read)

An Affidavit is a sworn statement of facts taken under oath before a Notary, with criminal liability for perjury. Used for single status, income, family relationship, overseas inheritance and minor travel consent. Request a quote — we draft for free. Must be sworn in person.

Key facts

Turnaround
1 business day
Fee from
Request a quote
Accepted by
Foreign courts + embassies + immigration
Validity
Global via MFA+embassy chain

Pricing & turnaround

Fee fromTHBTurnaround
Template (single/income)2,0001 business day
Custom draft (inheritance)3,5001–2 business days
Add witness affidavit (per witness)1,5001 business day
Rush 2 h + EN/TH translation4,500Rush 2 h

Step-by-step

  1. 1
    Tell us the facts
    Send the facts to be sworn + purpose + destination country via LINE or email.
  2. 2
    Attorney drafts
    Attorney drafts the affidavit in the destination-country format (UK Statutory Declaration, US Sworn Statement, etc.).
  3. 3
    Swear before attorney
    Recite "I swear/affirm under penalty of perjury..." before the attorney, then sign.
  4. 4
    Notarial certificate + chain
    Attorney issues Jurat / Notarial Certificate — optional MFA + embassy chain.

Service-specific FAQ

How is an Affidavit different from a normal certificate?

An Affidavit involves an oath + criminal perjury liability — carrying weight equivalent to court testimony. Ordinary certificates have no oath.

Can I use Affidavit instead of Thai single status?

Yes for US/UK/AU/CA. JP/KR/EU usually require the Thai DOPA single status certificate + translation + 3-step legalisation.

Does my minor travelling alone need a parent affidavit?

Yes — airlines and destination embassies require both parents' Consent + Affidavit of Sole Travel, notarised.

What happens if I lie?

Perjury under Penal Code §177 — 0–5 years imprisonment and/or fine, plus perjury exposure in destination country.

Do you really draft for free?

Standard templates (single/income/parental) are free; custom drafting (inheritance, foreign divorce) is +Request a quote.

Documents we notarize here

Related services

Legal references

  • Lawyers Council of ThailandNotarial Services Attorney licence issued by the Lawyers Council of Thailand under Royal Patronage. [ref]
  • Civil and Commercial Code of ThailandCivil & Commercial Code §§ 9 and 798 — signature acknowledgement and powers of attorney. [ref]
  • Ministry of Foreign Affairs (Thailand)Notarised documents are further authenticated by the MFA Department of Consular Affairs before embassy submission. [ref]

Supplemental Q&A from the 2026 SEO brief (this service)

What do I need for Power-of-Attorney (POA) notarization?

Bring (1) an UNSIGNED draft POA — you must sign in front of the attorney; (2) original passport or Thai ID; (3) attorney-in-fact details; (4) referenced supporting documents (land title, company affidavit). English POAs need a Thai translation if used in Thailand.

Does a foreigner's Will in Thailand need Notary certification?

A Will executed in Thailand under Civil Code §§1655-1672 needs only two witnesses — Notary is not required. But if the Will must be used abroad (e.g. to administer estate in the home country), we recommend Notary + MFA + embassy legalization for smoother acceptance.

How is a Certificate of Single Status notarized?

Thais: obtain from your district office → certified translation → MFA → foreign spouse's embassy. Foreigners: sign an Affidavit of Single Status before a Thai attorney or your embassy → MFA → present at Thai district office to marry.

What corporate documents are needed to open an account or register abroad?

Standard pack: (1) DBD company affidavit ≤30 days, (2) BOJ 5 shareholder list, (3) MOA, (4) meeting minutes authorising the transaction, (5) POA to the overseas signer, (6) directors' passports. All notarized → MFA → destination embassy (or Apostille).

What should an expat in Thailand bring for notarization?

(1) Original passport + current-visa page copy; (2) proof of Thai address (lease or utility bill); (3) original documents to notarize; (4) certified translation first if the document is not in English/Thai; (5) tell us the destination country so we can advise the correct chain (Apostille vs. embassy).

Get started today

Send your document or get a quote — we reply within 1 working hour.

Key takeaways

  • Only attorneys registered with the Lawyers Council of Thailand under the Lawyers Act B.E. 2528 may certify
  • You must sign in front of the attorney and present an original passport or Thai ID card
  • Documents used abroad usually also require MFA Department of Consular Affairs legalization and/or destination-embassy endorsement
  • Procedures and timelines may change; verify with the responsible authority before filing

Process at a glance

StepPerformed byDocuments neededApproximate time
1. Review the file and confirm the certification formatNotarial Services AttorneyDraft document + receiving authority's requirementsapprox. 1–3 hours
2. Sign in the attorney's presenceSignatory with the Notarial Services AttorneyOriginal passport or Thai ID cardapprox. 15–30 minutes
3. Issue the certificate and record it in the registerNotarial Services Attorney (Lawyers Council of Thailand rules)Signed documentapprox. 1 working day
4. Onward steps for overseas useDepartment of Consular Affairs, MFA and/or destination embassyCertified document + translation where requiredapprox. 2–7 working days

Durations are estimates and depend on the responsible authority's queue. Always confirm current requirements with the receiving body before filing.

Additional frequently asked questions

Can the attestation be used abroad immediately?
It depends on the destination. Many countries additionally require legalisation by the Department of Consular Affairs, Ministry of Foreign Affairs, and sometimes by their own embassy in Bangkok. Confirm the receiving party's chain before starting so the work is not repeated.
Do Thai-language documents need translation first?
If the recipient is a foreign authority, an English translation (or the official language of that country) is normally required, and the translation itself may need certification. The correct order is translate, certify the translation, then legalise.
What is needed to certify corporate documents?
Typically a company affidavit issued by the Department of Business Development within the recency window the recipient allows, ID or passport of the authorised director, the company seal if one is used, and the document to be attested. Scope and requirements are confirmed case by case by phone, LINE or email.
How long does an attested document stay valid?
The attestation itself has no expiry, but recipients such as embassies, banks and universities commonly require documents issued within the last 3–6 months. Always check the recipient's recency rule first.
What if the destination authority rejects the document?
Ask for the rejection reason in writing. Most rejections come from wording of the attestation clause, the order of the legalisation chain, or a translation that does not match the required format — each of which can be corrected without redoing the whole set.
Can the process be started from outside Thailand?
Document review, drafting the attestation wording and coordinating with authorities can all be done remotely. Only steps that legally require personal appearance must be completed before the attesting attorney or through a channel the destination accepts. Scope and requirements are confirmed case by case by phone, LINE or email.

How this connects to the next step

A notarised document rarely travels alone: most receiving authorities also require consular legalization at the Department of Consular Affairs (MFA), and for non-Hague destinations one further step of attestation by the destination country's embassy in Bangkok. The order of these steps cannot be swapped.

In depth: the real requirements and why documents get rejectedNotary Public

Written from the competent authority's published rules, not marketing copy.

Many applicants treat the notary stamp as a single, final step. In practice it is the first link in a certification chain that often continues through the Department of Consular Affairs and the destination embassy. The order of that chain is set by the receiving country, and reversing it is the most common reason a file comes back.

Conditions you actually have to clear

  • Thai-language documents intended for foreign use need a translation permanently bound to the original rather than loosely attached.
  • For a true-copy certification, the original must be produced on the day; comparison against an image file is not accepted by most authorities.
  • If the signatory cannot read the language of the instrument, an interpreter must be present and that fact recorded in the certificate.

Common causes of rejection

  • Re-binding the file or removing a seal after certification breaks continuity and forces the process to restart.
  • Signing in advance and asking for a backdated certificate — the attestation of signing in the certifier's presence would not match the facts, and the receiving body normally rejects the whole file.

Once the destination country and the receiving office are known, the required certificate form and the following steps can be fixed immediately. Having our team review the case first substantially reduces repeat work.

Key facts at a glanceNotary Public certification

Indicative price
From Request a quote per document set
Turnaround
Typically 1–2 business days (same-day rush available)
What you receive
Signed and sealed by a Thai Lawyers Council–registered Notarial Services Attorney
Service coverage
Nationwide Thailand — courier and fully online intake, no in-person visit required.

Figures above are indicative ranges; the final quote depends on page count, language pair and receiving authority.

Ask us or request a quote right away

Documents you need to prepareNotary Public certification

  1. 1Valid original passport or Thai ID card of the person signing
  2. 2The original document to be notarised — do not sign in advance; signing must occur before the attorney
  3. 3Details of the receiving authority — university, embassy, or overseas counterparty
  4. 4Company affidavit and power of attorney if signing for a legal entity

Before you start

  • Some documents have a limited acceptance window, so start the process close to your actual filing date.
  • Keep a copy of everything submitted in case the receiving authority requests further evidence later.

Practitioner guidanceCertification by a Notarial Services Attorney

Competent authority: Lawyers Council of Thailand

Practitioner guidance

  • If the document is for overseas use, plan the next steps (MFA legalisation, Apostille or embassy) from the start.
  • For companies, bring a recent company affidavit and evidence of directors' signing authority.
  • Review how the foreign form expects the certifier to complete it before the appointment.
  • Thailand has no standalone Notary Public office; certification is performed by a Notarial Services Attorney registered with the Lawyers Council of Thailand.
  • The signatory must sign in front of the attorney and present an original passport or Thai ID card.

Pitfalls — why documents get rejected

  • Presenting a passport copy instead of the original on the day.
  • Documents containing alterations or strike-throughs without initials.
  • Assuming attorney certification alone is accepted everywhere, when many countries require consular or embassy steps.
  • A company affidavit older than the destination accepts.
  • Foreign-language forms with no translation for the signatory to understand.

Official sources: www.lawyerscouncil.or.th · consular.mfa.go.th/th/publicservice/legalization

General guidance only. Requirements and processing times change — always verify with the competent authority before filing.

Unsure which route applies to your case? Ask our staff directly.

Basics

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Process

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Can't find your exact case? Ask our staff directly — enquiries are free.

In-depth questions and answersCertification by a Notarial Services Attorney

Answers follow the competent authority's published requirements, not marketing copy.

Which practices reduce correction rounds in Certification by a Notarial Services Attorney?

Bring the complete original document, including blank and stamped pages. The competent authority is Lawyers Council of Thailand. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

What should a first-time applicant know about Certification by a Notarial Services Attorney?

Tell the attorney the destination country and authority in advance, since the certification wording differs by use. The competent authority is Lawyers Council of Thailand. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

What is commonly overlooked in Certification by a Notarial Services Attorney but affects the outcome?

If the document is for overseas use, plan the next steps (MFA legalisation, Apostille or embassy) from the start. The competent authority is Lawyers Council of Thailand. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

How can a Certification by a Notarial Services Attorney document set be kept internally consistent?

For companies, bring a recent company affidavit and evidence of directors' signing authority. The competent authority is Lawyers Council of Thailand. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

In what order should Certification by a Notarial Services Attorney steps be sequenced to avoid rework?

Review how the foreign form expects the certifier to complete it before the appointment. The competent authority is Lawyers Council of Thailand. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Why are Certification by a Notarial Services Attorney documents rejected?

Observed cause: Signing in advance — the attorney cannot certify a signature made out of their presence. If you are unsure whether your case is affected, confirm with Lawyers Council of Thailand, or ask our staff by phone, LINE or email before filing. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Which mistake in Certification by a Notarial Services Attorney forces the process to restart?

Observed cause: Presenting a passport copy instead of the original on the day. If you are unsure whether your case is affected, confirm with Lawyers Council of Thailand, or ask our staff by phone, LINE or email before filing. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

What is a common misunderstanding about Certification by a Notarial Services Attorney?

Observed cause: Documents containing alterations or strike-throughs without initials. If you are unsure whether your case is affected, confirm with Lawyers Council of Thailand, or ask our staff by phone, LINE or email before filing. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Your case may have specific conditions — ask our staff directly.

094-895-8999LINE @ThainotaryNotary@ilc.ltd

Official sources: www.lawyerscouncil.or.th · consular.mfa.go.th

Continue with related services

The paths most clients take next — ask us by phone, LINE or email at any step.

Verified professional credentials

  • Member, Lawyers Council of Thailand (สภาทนายความ) verify
  • Registered certified translator, Ministry of Justice (Thailand) verify
  • Recognized agent for MFA Legalization Division, Thailand verify

Consumer protection & guarantees

  • Acceptance-or-rework guarantee: we redo the work at no charge if the receiving authority rejects a first submission due to a fault on our side.
  • Transparent fees quoted in writing before any work begins — no hidden surcharges.
  • Confidentiality: documents handled under a written non-disclosure undertaking.
  • Direct human contact for questions and quotations by phone, LINE or email.

Read the full Privacy Policy and Terms of Service

Composite cases assembled from commonly seen matters — not individual clients, no personal data.

director signature verification from Nonthaburi for an overseas company incorporation

an attorney-in-fact acting for the document holder from Nonthaburi — some certified copies were older than the destination's freshness rule

What we handled: prepared the translation and reconciled every name spelling against the passport · sequenced the certification chain to match the destination authority's rules

What clients usually ask in matters like this: are true originals required, or will certified copies do?

Indicative timeline: roughly 10–20 working days end to end

parental travel consent from Germany for a study or scholarship application

an authorised representative of a Thai-registered company from Germany — the originals were issued abroad, so the origin-country chain had to be completed first

What we handled: sequenced the certification chain to match the destination authority's rules · delivered a scanned set plus the originals with lodgement instructions · tracked progress between steps and reported status along the way

What clients usually ask in matters like this: if I am upcountry or abroad, must I attend in person?

Indicative timeline: roughly 3–7 working days end to end

power of attorney from Songkhla–Hat Yai for an overseas property transaction

a foreign national living in Thailand from Songkhla–Hat Yai — a tight travel or filing deadline required resequencing the work

What we handled: tracked progress between steps and reported status along the way · arranged the signing or lodgement appointment and listed what to bring

What clients usually ask in matters like this: if I am upcountry or abroad, must I attend in person?

Indicative timeline: roughly 7–14 working days end to end

Browse every case for this serviceCertification by a Notarial Services Attorney