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SSO / Labor / Revenue / Driving License

SSO, Labor, Revenue & Driving-License Letters — Translated, Certified, and Filed in One Stack

Covers SSO Section 33/39/40 certificates, employer SSO-1-10 history, Labor-Welfare employment letter, PND.91/50, PP.20 VAT, 1949 & 1968 IDP, foreign-license conversion, and proxy renewal of Thai license while abroad.

14+ document typesPer SSO Act, Revenue Code, Motor Vehicle ActThai Apostille effective 28 Feb 2027

Social Security (SSO)

SSO Section 33 Insured-Person Certificate

SSO-M33

Official certificate that a salaried employee is insured under SSO Section 33 — needed for visas, loans, and tenancy.

Free at SSO office; THB 50–100 service fee online

SSO Section 39 Voluntary Insured Certificate

SSO-M39

Voluntary continuation of SSO coverage after leaving employment — certificate proves ongoing social-security status.

Free certificate; monthly contribution THB 432

SSO Section 40 Self-Employed Certificate

SSO-M40

Voluntary self-employed SSO coverage — certificate confirms tier and contribution history.

Free; monthly contribution THB 70/100/300 by tier

SSO Employer Contribution History (SSO 1-10)

SSO-PAY

Employer-side contribution history — needed for BOI, work-permit renewal, and audit.

Free at SSO; service fee for proxy filing

Labor Welfare & Employment

Employment Certificate (Labor Welfare Office)

LAB-EMP

Official employment certificate verified by the Labor Welfare Office — used for visa, embassy, and overseas employment.

Free at office; service fee for legalization stack

Thai Overseas Worker Registration (Department of Employment)

DOE-OVS

Mandatory registration before leaving Thailand for overseas employment — gives consular protection and SSO Overseas Worker Fund coverage.

Overseas Workers Fund ~THB 300–500 + insurance per destination

Salary Slip & Income Certification

LAB-PAY

Certified translation of payslips and HR income letters for visa, mortgage, or relocation.

Service fee per page

Revenue Department / Income

Revenue Department Income Tax Certificate (PND.91)

RD-PND91

Certified copy of annual income-tax return (PND.91) — strongest single-document income proof for embassies and banks.

Free copy at RD branch; service fee for certified set

Corporate Income Tax Certificate (PND.50)

RD-PND50

Certified annual corporate income tax filing — required for BOI, tenders, and foreign joint ventures.

Free at RD; service fee for proxy filing

VAT Registration Certificate (PP.20)

RD-PP20

Official VAT registration certificate — mandatory for B2B invoicing, BOI, and import-export operations.

Free issuance; service fee for re-issuance and translation

Driving License (DLT)

International Driving Permit (IDP) — 1949 & 1968 Conventions

DLT-IDP

Thai-issued IDP valid in 150+ countries — 1949 Convention (1 yr) or 1968 Convention (3 yr).

THB 505 (1949) / THB 505 (1968)

Thai Driving License Translation + MFA Consular

DLT-TRANS

MoJ-certified translation of Thai driving license + MFA Consular legalization — accepted by most foreign DMVs.

Service fee + MFA fee THB 400 + embassy fee

Foreign Driving License Conversion to Thai License

DLT-CONV

Convert valid foreign license to Thai 2-year license — waive theory + practical tests under DLT regulation.

THB 305 + Thai medical certificate ~THB 500

Thai 5-Year License Renewal While Abroad

DLT-5YR

Proxy filing for Thai license renewal while overseas — power of attorney + apostilled medical + photo.

THB 505 renewal + service fee + Apostille fees abroad

Free quote — SSO, Labor, Revenue, Driving License — LINE @THAIL · Tel 092-0170000

SSO, Labor, Revenue and Driving-Licence Letters

Thai employment and residency come with a constant stream of official letters and certifications: Social Security Office (SSO) Section 33 / 39 / 40 contribution certificates, SSO 1-10 employment history, Ministry of Labor employment welfare certificate, Revenue Department PND.90/91/50 tax filings, PP.20 VAT registration certificate, driving-licence conversions (1949 IDP, 1968 IDP, foreign-licence exchange), and Department of Land Transport DL renewal for Thais abroad. iLC handles each request end-to-end: authenticated request letter to the authority, in-person filing, MoJ translation, notarial certification and courier delivery worldwide. These letters are frequently required by foreign banks for KYC, immigration authorities for source-of-funds evidence, and overseas insurance companies for policy underwriting.

End-to-End Process — work authorization letters

The workflow below reflects current 2025–2026 practice with the relevant Thai authority and factors in queue seasonality, translation dependencies, and cross-agency handoffs.

  1. 1) Request letter drafting

    Bilingual request letter aligned to the authority's standard template.

  2. 2) Authority filing

    In-person filing with signed authorisation from the applicant.

  3. 3) Certificate issuance

    timing is assessed on your documents depending on document type.

  4. 4) Translation and notarisation

    Certified English translation and NSA notarisation.

  5. 5) MFA + embassy chain

    For use overseas, MFA legalization plus destination-embassy stamp.

  6. 6) International courier delivery

    DHL / FedEx tracked shipment worldwide.

Documents and Preconditions

The checklist below covers standard files. Complex or corporate matters can add supplementary certificates, board resolutions, or notarised affidavits; iLC brief these during the intake call.

  • Passport / Thai ID copy
  • Power of Attorney for authority filings
  • Prior employment or tax filing data
  • Purpose statement (immigration, KYC, insurance)
  • Preferred delivery address
  • Payment of official fees

Who Uses This Service

Real-world scenarios where clients rely on this service every month, spanning individual, family, and corporate mandates.

Foreign KYC evidence

SSO 1-10 employment history for opening overseas bank account.

Immigration source-of-funds

Revenue PND.91 tax return translated and notarised for visa application.

Driving-licence conversion

Thai licence converted to UK, EU or Australian licence with MFA + embassy chain.

Foreign licence exchange in Thailand

Foreign licence exchanged for Thai 5-year licence at Department of Land Transport.

Options and Trade-offs

Three delivery paths are usually available. We select the option that balances cost, deadline pressure, and destination-authority preferences.

OptionProsTrade-offs
Simple certificateFastest (3 days)Cannot be used overseas without MFA + embassy
Certificate + notarialAccepted by most banks and insurersCannot be used for civil-registry filings
Full chain (MFA + embassy)Universally acceptedtiming is assessed on your documents end-to-end

In-Depth FAQ

Can I request SSO letters after resignation?

Yes; SSO retains employment history for many years and issues certificates on request.

Does the Thai licence conversion require a driving test overseas?

It depends on the destination — the UK often accepts direct exchange, whereas the USA requires a test in most states.

Can Revenue Department letters be issued in English?

Only the receipt and certificate; a certified translation is needed for the return itself.

Is the 1949 IDP still valid?

Yes for the 100+ countries that have not ratified the 1968 convention; both may be needed for extended overseas driving.

Local Expert Insight

Expert perspective: SSO, Labor, Revenue and Driving-Licence Letters

“Before proceeding with SSO, Labor, Revenue and Driving-Licence Letters, check names across documents and confirm the receiving authority's requirements to avoid incomplete submissions.”
กองบรรณาธิการ iLC
Legal Documentation Editorial Team

Scope to assess

Service tierFees
เอกสารเดี่ยว / Single docAsk our team for a quote
แปล + Notary / Translation + NotaryAsk our team for a quote
MFA legalizationAsk our team for a quote
Embassy chain / สถานทูตAsk our team for a quote

Workflow

  1. 01Review documents and the receiving authority's requirements
  2. 02Assess scope, fee, and timing for the specific case
  3. 03Process the documents and coordinate any further certification
  4. 04Check completeness and deliver by the agreed method

Before submission

For SSO, Labor, Revenue and Driving-Licence Letters, confirm names, document types, and the receiving authority's current requirements before starting. Timing and fees depend on each case.

Date shown: · Please confirm current requirements with the receiving authority

A working guide to work-authorization-letters in Thailand

work-authorization-letters has been the daily bread of our Bangkok office since 2011. Each matter is opened as a numbered case file that carries the same audit trail — intake note, translator sign-off, attorney jurat, and MFA/embassy stamps — from the first LINE message through to final courier hand-off. Every work-authorization-letters matter is scoped by a specialist on LINE Official @THAIL or by email at Contact@thailaw-accounting.co.th before any file moves.

How the workflow runs end-to-end

Every deliverable ships with a scanned colour PDF archive alongside the physical original, so the client can lodge with foreign embassies, DHA ImmiAccount, or destination universities the same day the original is dispatched by DHL, FedEx, EMS, or Kerry.

Who this service is for

Individual applicants and corporate or cross-border matters are each scoped on the documents supplied; timing is assessed for your documents and confirmed in writing before any work starts.

Coverage, fees, and timing

International return is handled by DHL Express, FedEx International Priority, or Thailand Post EMS depending on destination and client preference; each option carries a signed proof-of-delivery scan sent to the client's registered email once the pack is received abroad.

Quality assurance and confidentiality

For matters that go before Thai courts, translations are re-certified under the Ministry of Justice's court-listed translator register so the deliverable is admissible as a documentary exhibit under the Civil Procedure Code without a separate hearing on authenticity.

Start your work-authorization-letters matter today

Reach Thai Law & Accounting on LINE Official @THAIL, email Contact@thailaw-accounting.co.th, or phone 092-0170000. Please book an appointment in advance at our Bangkok office (Lat Phrao 95) or Khon Kaen head office; in every other province our team can coordinate with a local partner where available. Fees: ask our team for a quote. Timing is assessed for your documents, and you receive a required-documents checklist tailored to your destination country. The initial consultation carries no obligation to proceed with your work-authorization-letters matter.

Local Expert Insight

Expert perspective: work-authorization-letters

“Before proceeding with work-authorization-letters, check names across documents and confirm the receiving authority's requirements to avoid incomplete submissions.”
กองบรรณาธิการ iLC
Legal Documentation Editorial Team

Scope to assess

Service tierFees
เอกสารเดี่ยว / Single docAsk our team for a quote
แปล + Notary / Translation + NotaryAsk our team for a quote
MFA legalizationAsk our team for a quote
Embassy chain / สถานทูตAsk our team for a quote

Workflow

  1. 01Review documents and the receiving authority's requirements
  2. 02Assess scope, fee, and timing for the specific case
  3. 03Process the documents and coordinate any further certification
  4. 04Check completeness and deliver by the agreed method

Before submission

For work-authorization-letters, confirm names, document types, and the receiving authority's current requirements before starting. Timing and fees depend on each case.

Date shown: · Please confirm current requirements with the receiving authority

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