Affidavit Legalization — Embassy of United Kingdom
One-stop service — certified translation + Thai MFA + Embassy of United Kingdom at ถนนวิทยุ ปทุมวัน
Affidavit → Embassy of United Kingdom: step summary
Step
Turnaround
Cost
Translate Affidavit
1–3 days
THB 800–1,500 / page
Thai MFA legalization
2–3 days
THB 200–400
Embassy of United Kingdom
5-10 วัน
30-150 GBP
NYC Legal service
—
สอบถามเจ้าหน้าที่
Estimated total
7–21 days
THB 6,000–12,000
Popular documents at the Embassy of United Kingdom
Apostille (FCDO)Power of AttorneyStatutory Declaration
Legalising a Thai Affidavit for United Kingdom
A Thai-issued Affidavit is a domestic document until it is legalised for use abroad. For United Kingdom, that means a two-tier authentication: the Department of Consular Affairs verifies the translator's and issuing officer's signatures, then the Embassy of United Kingdom confirms the MFA stamp. NYC Legal handles both tiers, tracks each counter, and returns your document ready to file.
Why the legalization chain is required
Legalization is a chain of trust, not a formality. When a United Kingdom officer sees the embassy stamp on your Affidavit, they are trusting the embassy, which trusted the Thai MFA, which trusted the issuing office. NYC Legal builds this chain in the correct order so the final United Kingdom authority accepts the document without follow-up questions.
Certified translation requirements
Most United Kingdom authorities require the Thai Affidavit to be accompanied by a certified translation into a language the mission accepts — typically English, or the official language of United Kingdom. The translation must be faithful, complete, and produced by a translator whose signature the Thai MFA can verify. We use MFA-recognised translators so the translation itself can be legalised alongside the original.
Transparent, itemised pricing
Budget realistically: the Embassy of United Kingdom charges 30-150 GBP for authenticating a Affidavit, the Thai MFA charges roughly THB 200–400 per document (express ~THB 800), certified translation runs about THB 800–1,500 per page, and the NYC Legal all-inclusive service fee is สอบถามเจ้าหน้าที่. A typical single Affidavit therefore lands in the THB 6,000–12,000 range once every counter is paid.
Realistic timelines you can plan around
Turnaround is the sum of the chain: translation (1–3 days) + MFA (2–3 days) + Embassy of United Kingdom (5-10 วัน). We sequence these to overlap wherever possible and track each counter daily. For genuinely urgent Affidavit files we will tell you honestly whether your deadline is achievable before you pay.
What a legalised Affidavit is used for
Foreign nationals typically need a legalised Affidavit when dealing with United Kingdom government offices, courts, universities, employers or banks — anywhere the receiving party must trust a Thai record. At this mission the highest-volume documents are Apostille (FCDO), Power of Attorney, Statutory Declaration, and we handle each with the correct chain for its purpose.
Common mistakes we help you avoid
Rejections usually come from small, avoidable errors: an expired Affidavit, a translation that omits an official annotation, a name that reads differently from the passport, or a document submitted to the United Kingdom embassy out of sequence. We verify document freshness, translation completeness and stamp order before anything is lodged.
Why work with NYC Legal
NYC Legal has run the Thai-MFA-to-embassy chain for foreign clients for years. For your Affidavit to United Kingdom we handle certified translation, MFA legalization at Chaeng Watthana, and submission to the Embassy of United Kingdom at ถนนวิทยุ ปทุมวัน — with courier delivery of the finished original anywhere in the world. You get a fixed quote, a named case handler, and status updates at every counter.
Full legalization chain
Step
Where
Time
Note
1. Certified translation
NYC Legal — MFA-recognised translator
1–3 days
Affidavit translated into an accepted language, full layout mirrored