Witnessing Signatures on Contracts & Legal Documents
Our Notarial Services Attorneys provide witnessing of signatures on all types of contracts and significant documents, verifying the identity of the signatory. This service enhances credibility and assurance for both domestic and international transactions.
Who needs this service?
- Individuals & legal entities entering contracts
- Foreign investors
- Joint venture companies
- Those requiring legal credibility
- Parties in international transactions
Documents to prepare
- Sale & Purchase Agreements (SPAs)
- Settlement Agreements
- Shareholder Agreements
- Intellectual Property Assignment Agreements
- Powers of Attorney
- Lease Agreements
How it works
- 1
Schedule appointment & prepare documents
- 2
Identity and document verification
- 3
Client signs in attorney's presence
- 4
Attorney witnesses signature & seals document
- 5
Receive certified document with copy certification (if applicable)
Deliverables
- Contract document with witnessed signature
- Certificate of Notarial Services Attorney status
- Certified true copy of document (if requested)
Pricing: Service fees range from approximately 1,500 – 6,000 THB, depending on the type and complexity of the contract and documents..
ทนาย Notary ใกล้คุณ
กดอนุญาตตำแหน่งเพื่อให้เราจัดอันดับสาขา/ตัวแทนที่ใกล้คุณที่สุด พร้อมระยะทางจริง — หรือไม่อนุญาตตำแหน่งก็ค้นหาด้วย เขต/สถานี ได้ด้านล่าง
ไม่ต้องการเปิดตำแหน่ง? ค้นหาด้วย เขต/สถานี
ย่านธุรกิจ
Frequently asked questions
How does signature witnessing on a contract differ from a regular signature?
Signature witnessing by a Notarial Services Attorney certifies that the signatory is the individual who appeared before the attorney, providing enhanced credibility and legal recognition, especially for international use.
Do I need to bring the original contract documents?
Yes, typically original contract documents must be presented for signing in the presence of the Notarial Services Attorney to ensure the certification is complete and compliant with Lawyers Council Regulation B.E. 2546.
Can certified contracts be used internationally?
Yes, witnessing by a Notarial Services Attorney is recognised in many countries. Such documents can also be taken for further legalisation at the Department of Consular Affairs, Ministry of Foreign Affairs (MFA Chaeng Watthana), for international use.
แหล่งอ้างอิง / Authority References
- ข้อบังคับสภาทนายความ ว่าด้วย Notarial Services Attorney พ.ศ. 2546 — สภาทนายความในพระบรมราชูปถัมภ์
- การรับรองเอกสารโดยกรมการกงสุล (Legalization) — กรมการกงสุล กระทรวงการต่างประเทศ
- Apostille Convention (HCCH) — Hague Conference on Private International Law
- NAATI — Certified Translators (AU) — National Accreditation Authority for Translators and Interpreters
Ready to start?
Send us your document over LINE and we will quote within minutes. Same-day appointments available across Bangkok.
Official sources & further reading
Statements on this page follow the authorities below. Confirm current requirements with the authority before filing. Last reviewed 2026-07-29.
- Lawyers Council of Thailand — Notarial Services Attorney register — สภาทนายความฯ / Lawyers Council of Thailand
- Department of Consular Affairs, MFA Thailand — document legalization — กรมการกงสุล MFA
- HCCH Apostille Convention (1961) — full text & status table — HCCH (Hague Conference on Private International Law)
- MFA Thailand — embassies and consulates in Thailand — MFA Thailand
Related questions
- When was this page last reviewed?
- Each page shows its last-reviewed date in the sources section. Authority requirements change, so confirm current conditions with the receiving authority before proceeding.
- What is the fastest way to reach you?
- Call or message on LINE during business hours for an initial route check, and send legible photos of the documents by email or LINE so the scope can be assessed accurately.
- Where do I start if I am unsure which certification I need?
- Start with three questions: which authority will receive the document, in which country, and by what date. Those answers determine the authentication route, the translation language and the full sequence.
- Why are fees not published on the site?
- Scope varies widely with document count, language and the consular steps involved, so we quote against the actual work and confirm details by phone, LINE or email before starting.
Related services
- Book at the branch nearest youBangkok, greater Bangkok and upcountry
- Legal guides and reference articlesEvery article cites primary sources
- Reach our team by phone, LINE or emailShare your document details for a step plan
- Choosing the right authentication routeSide-by-side of steps, authorities and legal effect
- Embassy legalization by countryPer-mission conditions collected in one place
- Certified true copies for overseas useFor authorities that will not accept originals
- Sworn statements for overseas useSworn before a Notarial Services Attorney
- Arrange notarisation onlineSend drafts for review before the appointment
Fees are not published online — ask our team by phone, LINE or email for a scope-based quote.