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
Check the current instructions of the relevant authority and the receiving organisation before following these steps; requirements can differ by case.
Documents and Preconditions
This is a starting checklist, not a universal requirement. Confirm the current documents with the relevant authority for your case.
Who Uses This Service
These are possible situations, not records of completed client work or promises of an outcome.
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
Availability, timing and acceptable documents depend on the authority and the specific application.
