Why "Certificate of Authority / Signing Authority" must clear the United States embassy
Notarial confirmation of corporate signing authority for foreign counterparties, banks, and registrars.
Common scenarios: Signing M&A / Joint Venture agreements with a foreign counterparty · Opening a corporate account with a foreign bank · Registering an overseas branch/subsidiary
United States embassy requires advance booking for every case — NYC Legal handles queuing and submission for you.
Documents to prepare
• Company affidavit issued within 30 days • Memorandum of Association • Directors' passports
We check documents for completeness before filing to reduce the risk of return; acceptance remains at the embassy's discretion.
End-to-end chain: Notary → MFA → United States Embassy
1) Notary Public signature/copy certification (timeline depends on the document — ask our staff)
2) MFA Consular Department (2-3 business days) — we file in person
3) United States Embassy — U.S. Citizen Services require online booking · Documents must be notarized (US-style) + MFA Thailand
Embassy stage: approx. 3–5 business days; embassy fees per the published government rate
Language and translation for United States
Receiving authorities in United States usually expect the document or a translation in English. Ask the recipient whether a certified translation is needed and whether it should be attached before or after legalisation.
United States is a frequent destination for a "Certificate of Authority / Signing Authority", so check the mission's latest checklist before signing before the notary.
Documents the United States embassy commonly legalises
Embassy legalisation commonly covers 5 document categories; check the mission's current list before filing.
United States Embassy contact
📍 95 Wireless Road, Lumpini, Pathum Wan, Bangkok 10330
📞 +66 2 205 4000
🕘 Mon–Fri 07:30–16:30 (Notarial services by appointment)
🌐 https://th.usembassy.gov
FAQ
Does "Certificate of Authority / Signing Authority" for United States need Apostille or Embassy Legalisation?
United States does not accept Apostille — full embassy legalisation chain is required.
How long does the full chain take?
Notary timeline depends on the document — ask our staff + MFA 2-3 days + Embassy 3-5 business days — overall timing depends on each authority's queue; we confirm it in writing after document review.
What's the total cost?
Notary: fee confirmed in a written quotation from our staff. MFA fee is per the published government rate per stamp (standard or express) + Embassy fee per the published government rate.
Can overseas clients use this service?
Yes — ship documents via DHL/FedEx; we manage Notary+MFA+Embassy and ship back.