TL;DR
TM.18 (Immigration) ใช้เปิดบัญชี ทำใบขับขี่ — ขอที่ ตม. ใช้ 1-3 วันทำการ; R.O.22 (สรรพากร) ใช้ tie-breaker DTA — ต้องผ่าน 180-day test และยื่นพร้อมหลักฐาน Tabien Baan/สัญญาเช่า; การปลอม R.O.22 ป.อาญา § 264 จำคุก 3 ปี
TM.18 (Immigration certificate of residence): for opening a Thai bank account or applying for a Thai driver's licence. R.O.22 (Revenue Department): the only document recognised abroad as proof of Thai tax residency for DTA tie-breaker claims. Different issuers, different uses, different penalties for forgery.
TM.18 — Immigration's residence proof
Issued by the Immigration Bureau (Chaeng Wattana or provincial office) on Form TM.18. Valid 30–60 days depending on the requesting authority.
**Required:** passport with valid visa, TM.30 receipt (landlord notification), lease contract, two photos. quote on request (phone / LINE / email) depending on office.
**Used for:** opening a Thai bank account (most banks), applying for a Thai driver's licence, vehicle registration, condominium purchase registration at the Land Office.
R.O.22 — Revenue Department's tax-residency certificate
Issued by the Revenue Department's International Tax Division (Bangkok HQ) on Form R.O.22 (Thai/English bilingual). Required for any foreign tax authority to grant you DTA relief.
**Eligibility:** ≥ 180 days in Thailand in the calendar year + tax filings up to date + a Thai tax ID. Processing time ≈ 15 working days.
**Required evidence:** passport with entry/exit stamps for the full year, Tabien Baan or lease, PND.91 filing receipt, TM.30 receipts, employment contract / pension award letter.
Using R.O.22 abroad — Apostille pathway
Since 28 February 2027, Thailand is a party to the HCCH Apostille Convention. R.O.22 can be Apostilled at the Department of Consular Affairs (Chaeng Wattana) in 1 working day — no longer requires destination-country embassy legalisation.
Most CRS partners (UK HMRC, German Finanzamt, Singapore IRAS) accept the Apostilled R.O.22 directly for DTA tie-breaker filings.
Criminal exposure — never buy a 'fast' certificate
**Criminal Code § 264** — forgery of official documents: imprisonment up to 3 years + THB 60,000.
**Criminal Code § 268** — use of forged documents: same penalty as the forgery itself.
**Revenue Code § 37bis** — false statement to obtain tax benefit: up to 7 years.
Foreign tax authorities cross-check serial numbers with the Thai Revenue Department under DTA Article 26 (Exchange of Information). A forged R.O.22 is detected within weeks and triggers retrospective assessment in both jurisdictions plus a criminal referral.
คำถามที่พบบ่อย
Can a notary issue a Certificate of Residence?+
No. A Notarial Services Attorney can certify that you signed an affidavit attesting to your residence, but the official Certificate of Residence must be issued by Immigration (TM.18) or the Revenue Department (R.O.22). Banks and tax authorities will not accept a notarised affidavit as a substitute.
Do I need an R.O.22 if I hold an LTR Visa?+
Yes if you want to invoke a DTA tie-breaker abroad. The LTR status alone does not prove tax residency for foreign tax authorities; only the R.O.22 does. See /en/tax-residency-180day-crs-foreigner.
Can I get R.O.22 in my first year of arrival mid-year?+
Only if you cross 180 days within that calendar year. The Revenue Department will not issue R.O.22 prospectively — wait until day 181, then apply with the full evidence pack.
Is the TM.18 acceptable as proof of tax residency abroad?+
No. TM.18 is an Immigration document and is rejected by all foreign tax authorities for DTA purposes. Use it only for Thai banking and licensing. For DTA use, request R.O.22.
