Under the Lawyers Council of Thailand's regulations on Notarial Services Attorneys (2008, as amended), the authority of a Notarial Services Attorney covers: (1) signature authentication — certifying that the signatory signed in the attorney's presence; (2) document authentication — certifying a copy as a true copy; (3) sworn translation certification — certifying that a translation matches the original; (4) affidavit and oath administration — receiving sworn statements for use in overseas legal proceedings; (5) Power of Attorney certification — for use in cross-border transactions; and (6) corporate resolution certification — for use in overseas company registrations. Notarial authority is limited to acts expressly permitted by the regulations and cannot be used to validate acts contrary to law.
Our province-level service rests on four design principles: (1) Geographic Equity — clients in every province pay the same prices with no location surcharge; (2) Same-Day or Next-Day Response — every inquiry receives a reply within one business hour and work can begin the following day; (3) Multilingual Support — our team operates in Thai, English, Chinese, and Japanese; and (4) Transparent Pricing — all-in quotes provided before any work starts, with no hidden fees. These principles deliver an out-of-province experience indistinguishable from the Bangkok service.
For clients who require an attorney to physically attend for a wet-ink signing in their province, we offer Mobile Notary visits across Greater Bangkok at no travel cost, with resident Notarial Services Attorneys in Chiang Mai, Phuket, Chonburi/Pattaya, Khon Kaen, Khorat, and Songkhla/Hat Yai. Other provinces are served by an attorney dispatched from Bangkok or the nearest covered city, with travel billed at actual cost. The service suits elderly clients with mobility constraints, multi-witness signings, identity-verification-intensive matters, and cross-border commercial signings requiring formal ceremony.
Out-of-province clients preparing documents for overseas use typically need a full chain: Notary + MFA Authentication + destination Embassy Legalization. We manage the entire chain — clients ship originals to Bangkok, the attorney notarizes, we submit to MFA Bangkok at the Department of Consular Affairs, then submit to the destination Embassy, and finally ship the completed package back via EMS or Kerry Express. The full chain runs five to ten business days, excluding embassies with longer queues such as some Middle East missions where the embassy step alone can take two to three weeks.
Quality Assurance & SLA
เรารับประกัน Service Level Agreement ดังนี้ (1) Response Time — ตอบ inquiry ภายใน 1 ชั่วโมงในเวลาทำการ (จ-ศ 09:00-18:00) (2) Quote Time — แจ้งราคารวมทั้งหมดภายใน 4 ชั่วโมง (3) Start Time — เริ่มงานภายใน 1 วันทำการหลังลูกค้าส่งเอกสารและชำระเงิน (4) Delivery Time — เอกสารถึงมือลูกค้าภายในเวลาที่ตกลง หากเลย SLA โดยไม่ใช่เหตุสุดวิสัย เราคืนค่าบริการ 10% ของยอดรวม (5) Quality Guarantee — หากเอกสารถูกปฏิเสธโดยหน่วยงานปลายทางเนื่องจากความผิดพลาดของฝั่งเรา เราจัดการแก้ไขฟรี 100%
Our Service Level Agreement is: (1) Response Time — all inquiries replied to within one business hour during 09:00–18:00 Monday to Friday; (2) Quote Time — full inclusive quote within four hours; (3) Start Time — work begins within one business day after documents arrive and payment clears; (4) Delivery Time — documents arrive within the agreed window, with a 10% refund if we miss the SLA without force majeure; and (5) Quality Guarantee — if the document is rejected by the destination authority because of our error, we repair the work at no charge.
Notary Public Service in the Thai market ranges from THB 1,000 to 5,000 per seal depending on the firm's reputation and the document's complexity. Our standard rate is THB 1,500 per seal for general documents and THB 2,500 to 3,500 per seal for complex legal instruments such as POAs, Affidavits, and Corporate Resolutions. This includes preliminary document review, consultation on next steps (MFA, Embassy), and the Notarial Services Attorney certification page with verifiable license number. Compared with Asoke/Silom firms charging THB 3,000 to 5,000 per seal, our pricing sits in the lower-mid range while maintaining premium quality.
Notary Public Guide for Chiang Mai — 2026 Complete Handbook
Last reviewed: 2026-06-17 · By NAATI Thailand Editorial Team · English edition
Chiang Mai is Thailand's leading retirement and digital-nomad city, with the country's highest proportion of long-stay foreign residents on Non-Immigrant O-A, O-X and LTR visas. The Chiang Mai Provincial Immigration Office on Promenada Road and the Mueang Chiang Mai Amphoe process tens of thousands of foreigner-related filings per year — most of which require notarised supporting documents: bank-balance letters, source-of-funds declarations, health insurance certifications, wills, and Powers of Attorney for property and elder-care decisions.
Notary market context — Chiang Mai
Three demand clusters dominate. (1) Retirement and long-stay visa renewals — applicants must produce notarised bank statements and insurance declarations matching the THB 800,000 / USD 100,000 thresholds set by Immigration Bureau orders. (2) Cross-border estate planning — Chiang Mai's expat community executes bilingual Thai–English wills, healthcare directives and advance medical directives that require notarisation to be accepted by Thai hospitals and probate courts. (3) Education and university work — Chiang Mai University, Payap and MFU need notarised academic credentials for inbound foreign students, while outbound Thai students need notarised transcripts for graduate study abroad.
Local logistics
Our Chiang Mai workflow uses LINE @NAATI and same-day flights on Thai AirAsia and Bangkok Airways (CNX–BKK). Originals can also be sent via Kerry Express from MAYA or Central Festival to our Bangkok office overnight. For documents needed by the Chiang Mai Immigration Office (CW Tower / Promenada), turnaround is normally 48 hours including courier. For Apostille-bound documents — increasingly common since Thailand's Apostille accession in December 2025 — we run MFA legalisation in Bangkok and ship the legalised set back to CNX in the same parcel.
Top use cases in Chiang Mai
Retirement visa renewal — notarised bank letter
A 68-year-old British retiree renewing his Non-O retirement visa at Chiang Mai Immigration needs a notarised letter confirming THB 800,000 on deposit for 3 months.
(1) Bank issues the letter and statement; (2) We translate the statement into English (or vice versa), notarise the signature of the bank officer, and attach our notarial certification; (3) Document is couriered to Chiang Mai for the immigration appointment.
Fee: Bank letter notarisation THB 2,500 + translation THB 1,200 + courier THB 200
Bilingual will and healthcare directive
A Canadian–Thai couple in Hang Dong want a will valid in both Thailand and Canada, plus a healthcare directive accepted by Bangkok Hospital Chiang Mai.
(1) Drafting based on Sections 1646–1755 of the Civil and Commercial Code (Thai succession) and the client's Canadian provincial requirements; (2) Witnessed signing in Chiang Mai or by video; (3) Notarial certification plus optional Apostille for Canadian use.
A Chiang Mai University graduate accepted to a Master's at ETH Zürich needs notarised, MFA-legalised and Apostilled copies of her transcript and degree.
(1) Certified true copies of original Thai documents; (2) Translation into English; (3) MFA legalisation and Apostille; (4) Tracked courier to Zurich.
For Chiang Mai residents: (1) LINE consultation; (2) Scan upload; (3) Drafting aligned to the receiving authority (Chiang Mai Immigration, Mueang Amphoe, hospital, foreign university or court); (4) Identity verification — video call or in-person signing in Chiang Mai; (5) Optional MFA legalisation / Apostille; (6) Courier return with tracking. Most files clear in 24–72 hours.
Common pitfalls and how we screen for them
Frequent issues in Chiang Mai: (a) Bank letters older than 30 days at submission — Chiang Mai Immigration refuses these; (b) Insurance certificates that do not name the policy holder exactly as on the passport; (c) Wills drafted in English alone — Thai probate courts require a Thai version or sworn translation; (d) Academic documents notarised without certified translation, which Apostille will not accept. We screen for all four before signing.
Pricing and turnaround
Indicative pricing: notarised bank letter THB 2,500; insurance declaration THB 2,500; bilingual will THB 12,000; healthcare directive THB 3,500; certified true copy + translation THB 2,700/document. Standard turnaround 24–72 hours; Apostille adds 2–4 working days.
Frequently asked questions
Editorial conclusion
Chiang Mai's notary needs are dominated by long-stay foreigners — retirement, insurance, estate planning, and academic mobility. The reliable path is to align each document with the specific receiving authority (Immigration, hospital, Amphoe, or foreign university) and to budget the realistic 24–72 hour turnaround, plus 2–4 days if Apostille is needed.
เอกสารส่วนใหญ่ต้องผ่านหลายขั้นตอนต่อเนื่องกัน ลิงก์ด้านล่างช่วยให้ดูขั้นตอนถัดไปได้ครบในที่เดียว สอบถามรายละเอียดและค่าบริการกับเจ้าหน้าที่ทางโทรศัพท์ LINE หรืออีเมลได้ตลอดเวลา
