One-stop service — certified translation + Thai MFA + Embassy of Japan at ถนนวิทยุ ลุมพินี
Affidavit → Embassy of Japan: 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 Japan
5-10 วัน
200-2,000 JPY
NYC Legal service
—
สอบถามเจ้าหน้าที่
Estimated total
7–21 days
THB 6,000–12,000
Popular documents at the Embassy of Japan
Notarized TranslationApostille戸籍謄本
Legalising a Thai Affidavit for Japan
Getting a Thai Affidavit recognised by the Japan authorities almost always requires a full legalization chain rather than a single stamp. Because Thailand is not a party to the Hague Apostille Convention for this route, a Affidavit issued in Thailand cannot simply be apostilled — it must first be certified by the Thai Ministry of Foreign Affairs (Legalization Division, Chaeng Watthana) and then authenticated by the Embassy of Japan in กรุงเทพฯ (วิทยุ). NYC Legal manages this end to end so you never have to queue in person.
Why the legalization chain is required
Legalization is a chain of trust, not a formality. When a Japan 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 Japan authority accepts the document without follow-up questions.
Certified translation requirements
Because the Japan embassy reads the translated text, translation accuracy directly determines acceptance. Names must match your passport exactly (including transliteration), dates must follow the destination format, and official Thai terminology must map to the correct Japan legal equivalent. We proofread against your passport and prior documents before submission.
Transparent, itemised pricing
Costs are itemised, never bundled opaquely. Expect the Japan consular fee (200-2,000 JPY), the MFA legalization fee (THB 200–400 standard), translation (THB 800–1,500/page), and our handling fee (สอบถามเจ้าหน้าที่). We quote the exact total up front — including courier — so there are no counter-side surprises when your Affidavit reaches the Japan mission.
Realistic timelines you can plan around
Plan for 5-10 วัน at the Japan embassy stage, on top of 2–3 business days at the Thai MFA and 1–3 days for certified translation. Realistically a single Affidavit takes 7–21 business days end to end. If you have a visa interview or filing deadline, tell us first — express MFA and priority embassy handling can compress this materially where the mission allows it.
What a legalised Affidavit is used for
Foreign nationals typically need a legalised Affidavit when dealing with Japan government offices, courts, universities, employers or banks — anywhere the receiving party must trust a Thai record. At this mission the highest-volume documents are Notarized Translation, Apostille, 戸籍謄本, 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 Japan 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 Japan we handle certified translation, MFA legalization at Chaeng Watthana, and submission to the Embassy of Japan at ถนนวิทยุ ลุมพินี — 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