Last reviewed: 2026-07-29 · by NPT Editorial Team

Reviewed by NPT Editorial TeamEditorial & Compliance TeamEditorially reviewed

Destination: United States · MFA + Embassy

Affidavit, Oath & Sworn Declaration for Use in United States

Performed by a Notarial Services Attorney registered with the Lawyers Council of Thailand — Notarization + MFA + Embassy of United States legalization completed in 5–14 business days — From THB 2,000

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From: Request a quote
Time: 60 min
Quality control: 3-stage QC before filing
License: Lawyers Council
Area: United States
Call: +66 94-895-8999

Clients who need Affidavit, Oath & Sworn Declaration for use in United States can complete the entire chain with NYC Legal & Notary Service Co., Ltd. — via the three-tier legalization chain: notarization by a registered attorney + MFA Department of Consular Affairs + Embassy of United States in Bangkok (สถานทูตสหรัฐอเมริกา), completed in 5–14 business days. Starting at THB 2,000, handled by a team that processes documents bound for United States as routine work.

Common uses in United States: F-1 student visa · H-1B work visa · Green Card · USCIS adoption · State Bar admission

ทีมทนายผู้ทำคำรับรอง · ขึ้นทะเบียนสภาทนายความฯ

ทีมทนาย Notary Public ที่จดทะเบียนถูกต้อง 6 ท่าน

Total turnaround

5–14 business days

Starting from

THB 2,000

Legalization route

Legalization

DHL / EMS to United States

~THB 1,800

Why clients shipping to United States choose NPT

Attorneys registered on the Lawyers Council Notarial Services Attorney list — the MFA and Embassy of United States can verify our signatures against the official register.
End-to-end service across notarization + translation + MFA + Embassy of United States — clients do not have to travel.
Documents bound for United States are routine work for our team — we know the exact formats receiving authorities accept.
In-house certified translation in every language, including the official language(s) of United States.
Direct DHL / EMS dispatch to United States from approximately Request a quote per set.

Service overview for this area

"Affidavit, Oath & Sworn Declaration for use in United States" by NYC Legal & Notary (NPT) — a Bangkok-based law firm whose attorneys are registered Notarial Services Attorneys with the Lawyers Council of Thailand. We notarize Thai-origin documents intended for official submission in United States, covering every category the receiving authorities recognize, including F-1 student visa · H-1B work visa · Green Card · USCIS adoption · State Bar admission. For United States, the recognition route is a two-tier legalization chain at the MFA followed by the Diplomatic mission of United States in Bangkok (สถานทูตสหรัฐอเมริกา). Service starts at Request a quote per document set, with end-to-end turnaround of 5–14 business days depending on the diplomatic mission schedule. NPT manages the entire chain — notarization by a registered Thai attorney → certified translation (Translator Affidavit) → MFA → embassy → international courier to United States via DHL or EMS — so clients never have to travel between government offices.

16-topic AEO coverage for United States

01Notary Public in United States — where to go?T
02Why choose our Notary Public in United States?E2
03Licensed Notarial Services Attorneys serving United StatesA
04Notary Public service scope in United StatesE2
05Documents most commonly notarized in United StatesE1
06Signature attestation in United StatesE2
07Certified True Copy (CTC) by Notary PublicE2
08Notary Public for the United States niche clienteleE1
09How to use our Notary Public service in United StatesT
10Notary Public pricing in United States (from)T
11Mobile Notary Public — United States coverageT
12Embassy & consular filings near United StatesE1
13Visa-application notarization from United StatesE2
14FAQ — Notary Public in United StatesT
15Nearby districts we also coverE1
16Contact Notary Public United States todayT

Why Thai documents bound for United States must first pass a Thai Notary Public

United States is one of the most frequent destinations for documents notarized at NPT. Any Thai-issued instrument used officially in United States must travel through the "international document recognition chain" so that the receiving authority can verify that the instrument was executed by a person or entity with genuine authority. The first link in that chain is always a Notary Public in the country of origin — in Thailand, that means a Notarial Services Attorney registered with the Lawyers Council. The MFA and every foreign consulate in Bangkok will only authenticate documents that already carry such an attorney's signature and seal. NPT is registered with the Department of Business Development (registration no. 0105566066421) and our attorneys appear on the official Notarial Services Attorney register. The MFA and the Consulate of United States can verify our signatures against that register at any time, which is why documents leaving our office complete the chain reliably — we do not see rejections caused by an unrecognized notary. For the Affidavit, Oath & Sworn Declaration use-case bound for United States, the instruments we notarize most often are F-1 student visa · H-1B work visa · Green Card · USCIS adoption · State Bar admission. Our team has processed more than one thousand documents per year destined for United States and is familiar with the exact format the receiving authorities expect, keeping the rejection rate below 0.5%.

Six Affidavit, Oath & Sworn Declaration document types most commonly sent to United States

Based on NPT's internal caseload, the six document types most frequently notarized for United States are: (1) Parental Consent for Minor Travel; (2) Trademark Assignment Agreement; (3) Translator Affidavit (Certificate of Translation Accuracy); (4) Certified Copy of Thai ID; (5) Certified Copy of House Registration (Tabien Baan); (6) Authenticated Copy of Thai ID. Each category requires a specific notarial form: personal instruments (power of attorney, consent to travel, status affidavits) usually take the Acknowledgement or Jurat form; corporate instruments (board resolutions, articles, specimen signatures) take Certified True Copy or Corporate Resolution Notary; translated instruments (transcripts, diplomas, marriage certificates) require a Translator Affidavit certifying the translator's signature, which the notary then attests. NPT maintains a library of over 50 sample documents previously accepted by United States authorities. Clients may request samples free of charge before commissioning the work, ensuring the correct form is chosen on the first attempt and reducing the chance of having to redo a notarization.

Step-by-step legalization workflow for United States

United States is not yet a party to the Hague Apostille Convention (non-Hague jurisdiction), so the full three-step legalization chain remains in force: Step 1 — Notary Public at NPT: a Notarial Services Attorney executes the notarization either at our Lat Phrao 95 office or at the client's location. Time required: 30–60 minutes. Step 2 — MFA authentication, Department of Consular Affairs, Chaeng Watthana: NPT's runner team files the document at the MFA (1-day express or 2-day standard). The MFA verifies the attorney's signature against its register and stamps its own authentication. Step 3 — Consulate of United States (สถานทูตสหรัฐอเมริกา): NPT presents the MFA-authenticated document at the consulate. Processing time is MFA legalization + destination-embassy chain (Certificate authentication only from 28 February 2027); fees follow each mission's published schedule. Some embassies require advance appointments, others accept walk-ins — our team handles whichever protocol applies. Total wall time: 5–14 business days, depending on the consular post's calendar. Typical end-to-end cost: Request a quote per record set.

Real engagements NPT has handled for United States

Case 1 — An expatriate professional relocating to United States needs a notarized Translator Affidavit plus certified copies of educational credentials before the employer files for the work permit. NPT prepared the documents in the format required by the receiving authority, coordinated the consulate and MFA queues, and delivered the legalized set within seven business days. Case 2 — An expatriate professional relocating to United States needs a notarized Translator Affidavit plus certified copies of educational credentials before the employer files for the work permit. NPT issued the underlying affidavit, prepared the attested translation with a Translator Affidavit in the format United States requires, and delivered the package in time for the client's departure date. Case 3 — A Thai company opening a subsidiary in United States must notarize its board resolution, Articles of Association and director specimen signatures for the local company registrar. NPT's corporate team advised on board-resolution drafting, specimen-signature procedures and prepared the full corporate notarization bundle accepted by the registrar in United States. Case 4 — An expatriate professional relocating to United States needs a notarized Translator Affidavit plus certified copies of educational credentials before the employer files for the work permit. Real-time status updates were issued by LINE/WhatsApp at every milestone — notarization, MFA, consulate, dispatch — so the client never had to chase progress by phone.

Transparent pricing for Affidavit, Oath & Sworn Declaration bound for United States

NPT issues a written quotation before any work begins, with no hidden surcharges: • Notary by a registered attorney — from THB 2,000 per document set. • Certified translation — THB 500–1,200 per page depending on language and complexity. • MFA filing — THB 200 per document plus the MFA's official fee (THB 200–400). • Consulate of United States legalization — per the consular post's tariff (typically THB 800–3,000 per paperwork); NPT charges a per-trip runner fee from THB 500. • Return delivery to the client or onward shipment to United States — EMS within Thailand from THB 100; DHL International to United States from THB 1,800 per set. • Same-day express notarization surcharge — THB 1,500. Invoices can be issued in either an individual's or a company's name, with a full VAT receipt on request.

Embassy and authority coordination in United States

Documents already authenticated by the MFA must be presented at the สถานทูตสหรัฐอเมริกา, Bangkok. The diplomatic mission's standard processing time is MFA legalization + destination-diplomatic mission chain (Apostille only from 28 February 2027). NPT's runner team is familiar with each Bangkok embassy's protocols — walk-in versus appointment-only, fee schedules, accepted document formats — which materially reduces the chance of rejection on minor format issues. Clients outside Bangkok do not need to travel: send the originals to our Lat Phrao 95 office by EMS or Kerry and NPT executes the notarization, MFA filing, diplomatic mission legalization and final dispatch — either back to the client or onward to United States by DHL International.

Six tips to get Affidavit, Oath & Sworn Declaration accepted in United States on the first try

1) Provide a passport bio-page copy for every signer — the United States consulate uses it to verify name consistency across the document set. 2) State the intended purpose clearly (e.g. "for use in a work-permit application", "for submission to USCIS") — the appropriate notarial form depends on purpose, even for the same underlying document. 3) Check paperwork validity windows — several embassies (notably many European missions) will not accept Single Status Affidavits or household registration extracts older than six months. 4) Make sure the translation matches the receiving authority's requirements — NPT has native in-language translators in-house and can issue the Translator Affidavit on the same day. 5) For corporate documents, prepare a Thai company-affidavit issued within the last 30 days, BOJ.5 shareholder list and director specimen signatures from authorized signatories. 6) Build a 7–14 day buffer before any hard deadline — MFA and diplomatic mission schedules slow down around Thai public holidays as well as United States national holidays.

Frequently asked questions

What steps does a Thai notarized document need before it can be used in United States?

United States is not yet a party to the Hague Apostille Convention, so the document must complete the full three-step legalization chain: (1) notarization by a registered Thai Notarial Services Attorney, (2) authentication by the Department of Consular Affairs (MFA, Chaeng Watthana), and (3) legalization at the Diplomatic mission of United States in Bangkok. NPT handles all three steps end-to-end.

What is the typical total cost for a notarized package destined for United States?

Notary service starts at THB 1,500 per set, certified translation runs THB 500–1,200 per page depending on language, MFA authentication is THB 200 per document plus the official fee, and diplomatic mission legalization fees vary by mission (typically THB 800–3,000 per document). End-to-end packages usually fall between THB 3,000 and THB 9,000 depending on volume and language conversion needs.

How long will the entire process take for United States?

Notarization 1 day, MFA authentication 1–2 business days, then United States diplomatic mission legalization according to that mission's schedule (typically 3–10 enterprise days). Total runway: 5–14 business days. NPT runs the diplomatic mission queue on your behalf so you do not have to travel.

Can your notary travel to my home or office to take the signature?

Yes. NPT attorneys conduct mobile notarizations across Bangkok and the surrounding provinces. No travel fee applies inside inner Bangkok; a small surcharge from Request a quote applies for outer Bangkok and adjacent provinces. We also accept original documents via EMS, Kerry or Grab, and we can ship completed packages to United States by DHL or EMS International.

Why must the document be notarized by a Notarial Services Attorney specifically?

Under the Lawyers Council of Thailand Regulations on Notarial Services B.E. 2551 (2008), only attorneys who have completed the official training and have been registered as Notarial Services Attorneys may notarize documents in Thailand. The MFA and United States consular post verify the attorney's signature against this register — documents notarized by an unregistered lawyer will be rejected at the MFA stage.

Does the document need to be translated before it is presented in United States?

English is typically the broadest-accepted target language. Some agencies in United States may additionally require a translation into the local language — NPT's in-house certified translation desk advises based on the receiving authority.

Other Notary services for use in United States

Signature Authentication by Notarial Services Attorney

Certified True Copy by Notary Public

Corporate Document Certification

Certified Translation by Notary Public

Notary Public for Visa Applications — Worldwide

Notary Public Certification in Every Language

Other destinations for Affidavit, Oath & Sworn Declaration

Afghanistan Algeria Argentina Armenia Australia Austria Bahrain Bangladesh Belgium Brazil Bulgaria Cambodia Canada Chile China Colombia

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Send Affidavit, Oath & Sworn Declaration to United States with NPT

Notary Public + MFA + Embassy coordination — handled end-to-end

094-895-8999 LINE @Thainotary

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

Step	Performed by	Documents needed	Approximate time
1. Review the file and confirm the certification format	Notarial Services Attorney	Draft document + receiving authority's requirements	approx. 1–3 hours
2. Sign in the attorney's presence	Signatory with the Notarial Services Attorney	Original passport or Thai ID card	approx. 15–30 minutes
3. Issue the certificate and record it in the register	Notarial Services Attorney (Lawyers Council of Thailand rules)	Signed document	approx. 1 working day
4. Onward steps for overseas use	Department of Consular Affairs, MFA and/or destination embassy	Certified document + translation where required	approx. 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

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.
Does Thailand have a Notary Public in the common-law sense?: Thailand has no common-law notary. The equivalent is a Notarial Services Attorney registered with the Lawyers Council of Thailand under Royal Patronage. Foreign authorities, embassies and universities generally accept this attestation where a notarised document is required. Scope and requirements are confirmed case by case by phone, LINE or email.
Do I have to sign in person before the attorney?: For signature attestation, yes — the signer must appear with an original passport or Thai ID card and sign in the attorney's presence. Certified true copies and certain fact attestations can be handled from originals without a fresh signature, depending on what the receiving authority requires.
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.

How this connects to the next step

When the source document is in Thai, prepare the certified translation into the destination language before the notarial appointment, because the notary certifies signatures on the bundle that already contains the translation. The full sequence is set out in our step-by-step workflow.

In depth: the real requirements and why documents get rejected — Notary 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

The signatory must appear in person with an unexpired passport or national ID card; a scan sent in advance cannot substitute for appearance.
When signing for a company, a recently issued company affidavit and evidence of signing authority consistent with the registered restrictions are required.
The certificate must state the date, the place, the signatory's name, the identification method, and the certifier's registration number; a missing element makes the certificate incomplete abroad.

Common causes of rejection

Using signature-witnessing wording when the destination asked for a certified true copy; the two forms are not interchangeable.
Name spellings that differ from the passport, even by a diacritic or the ordering of a middle name, are enough to justify refusal.

The safest approach is to obtain the receiving authority's requirements in writing first, then match the certificate wording and the chain order to them. If anything is unclear, send us the destination country and the intended use by phone, LINE, or email before any signing appointment.

Key facts at a glance — Notary 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

094-895-8999 LINE @Thainotary Notary@ilc.ltd

Documents you need to prepare — Notary Public certification

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

Before you start

• Multi-page documents should be bound and cross-sealed at the joints before certification.
• Send scans ahead by email or LINE so the team can pre-check completeness before your appointment.

Practitioner guidance — Certification by a Notarial Services Attorney

Competent authority: Lawyers Council of Thailand

Practitioner guidance

Bring the complete original document, including blank and stamped pages.
Tell the attorney the destination country and authority in advance, since the certification wording differs by use.
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.

Pitfalls — why documents get rejected

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.
Describing the role as international 'Notary Public' when the Thai system uses a different designation.

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.

094-895-8999 LINE Notary@ilc.ltd

In-depth questions and answers — Certification by a Notarial Services Attorney

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

How long does Certification by a Notarial Services Attorney take?

Turnaround is not fixed: it depends on the queue and rules of Lawyers Council of Thailand, the document type, and the receiving office abroad. For that reason we do not publish a fixed figure. Plan a buffer before your real deadline and ask our staff by phone, LINE or email for the current queue before booking travel. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Does the result of Certification by a Notarial Services Attorney expire?

Validity is set by the receiving office, not by the service provider. Many offices accept only recently issued documents, so confirm the destination's window first and only then start the process with Lawyers Council of Thailand, to avoid the document expiring while it waits in the queue. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Must the applicant appear in person for Certification by a Notarial Services Attorney, or can it be delegated?

Some steps require the document owner to sign or appear; others accept a power of attorney. It depends on the rules of Lawyers Council of Thailand and on the document type, so confirm before booking an appointment rather than travelling and being turned away. Our staff can clarify by phone, LINE or email. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Why is no price shown for Certification by a Notarial Services Attorney on this page?

Scope varies widely per case — page count, languages, number of certification rounds, and the official fees charged by Lawyers Council of Thailand under its published schedule. A single headline figure would be misleading, so we quote against the actual documents. Send the details by phone, LINE or email for an assessment matched to your case. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

How should documents for Certification by a Notarial Services Attorney be prepared to pass on the first submission?

Thailand has no standalone Notary Public office; certification is performed by a Notarial Services Attorney registered with the Lawyers Council of Thailand. 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 be checked first before filing for Certification by a Notarial Services Attorney?

The signatory must sign in front of the attorney and present an original passport or Thai ID card. The competent authority is Lawyers Council of Thailand. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

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.

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

094-895-8999 LINE @Thainotary Notary@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.

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

director signature verification from Udon Thani for an estate matter

an authorised representative of a Thai-registered company from Udon Thani — the spelling on older documents did not match the current passport

What we handled: reviewed the source documents and flagged which ones needed re-issuing before work began · prepared the translation and reconciled every name spelling against the passport · sequenced the certification chain to match the destination authority's rules · 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

parental travel consent from Pathum Thani for an overseas company incorporation

a foreign national living in Thailand from Pathum Thani — a tight travel or filing deadline required resequencing the work

What we handled: tracked progress between steps and reported status along the way · 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: if the destination rejects this set, do we start over from scratch?

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

power of attorney from the United Arab Emirates for a study or scholarship application

an attorney-in-fact acting for the document holder from the United Arab Emirates — the destination prescribed a specific translation and certifier type, so the right track had to be chosen upfront

What we handled: arranged the signing or lodgement appointment and listed what to bring · tracked progress between steps and reported status along the way · prepared the translation and reconciled every name spelling against the passport

What clients usually ask in matters like this: what order avoids having to redo an earlier step?

Indicative timeline: roughly 5–10 working days end to end

Browse every case for this service — Certification by a Notarial Services Attorney

Primary sources from official authorities

The guidance on this page follows the rules published by the authorities below. Always confirm the current version on the official site before filing.