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Overview

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Identifiers

Collect two identifiers from each business customer in Thailand and submit them as strings on the application body. Tax ID: 13-digit; digit 1 = entity type, digits 2–5 = province/office, digits 6–9 = Buddhist Era year, digits 10–12 = sequential ID, digit 13 = check digit. Identical to TIN for juristic persons. Registration number: 13-digit; digit 1 = entity type, digits 2–5 = province/office, digits 6–9 = Buddhist Era year, digits 10–12 = sequential ID, digit 13 = check digit. Identical to TIN for juristic persons.

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Sector regulators

BoT · SEC TH · OIC · BOI · AMLO

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How documents combine

For each evidence area, this table shows whether the listed documents are alternatives (any one of) or a bundle (all required). The artifact-by-artifact lookup follows below.

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Documents to collect

The physical documents you’ll collect from your customer, with the evidence area each one proves. One document can prove multiple areas — for example, Brazil’s Cartão CNPJ covers both tax and business-registration proof, so it appears once with both areas listed.

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Collection notes

  • Legal Registration: Issued by DBD; downloadable from encert.dbd.go.th or DBD Biz Regist. Lists registration number, directors, address, status. English version available from DBD portal.
  • Constitutive Documents: Filed at incorporation and stored with DBD. For PCL, equivalent documents filed under Public Limited Companies Act B.E. 2535.
  • Tax Registration: TIN equals DBD registration number. VAT certificate (ภ.พ.20) issued only after VAT registration; collect both if VAT-registered.
  • Operating Permit: Thailand has no single universal operating permit; DBD registration serves as baseline. Activity-specific permits (food, hotel, factory, etc.) issued by relevant authority. Collect whichever applies to the entity’s declared activity.
  • Sector-Specific License: Financial entities must hold the relevant regulator’s licence. Payment service providers require BoT licence under Payment Systems Act B.E. 2560 (2017).
  • Ownership Records: Form บอจ.5 filed with DBD at each AGM.
  • Governance Records: DBD Certificate lists current authorised directors and signing conditions. Changes notified to DBD within 14 days (CCC s.1157).
  • Signing Authority: Notarised PoA required for delegation outside the board.
  • Address: Lease (no freshness requirement) or utility bill or bank statement dated within 90 days. Same document satisfies both registered-address and operating-address verification.
  • Good Standing: Thailand’s DBD does not issue a separate Certificate of Good Standing. The หนังสือรับรอง (Company Affidavit) is issued on-demand from the live DBD registry and carries the entity’s current registered status, directors, address, and capital — Thai banks accept it as the live attestation. Request an Affidavit dated within 30 days, ordered via DBD e-Service, DBD office branches, or partner-bank e-Certificate services.

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Person roles

When you submit a person on the application body, set their role to one of Conduit’s canonical BusinessPersonRole values. Use this table to map a local corporate-governance title onto the right canonical role.

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Additional fields

Country-specific fields you’ll need to collect during onboarding, beyond the document uploads.

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Notes

  • The 13-digit DBD registration number and the Revenue Department TIN are the same number for juristic persons — do not collect them as two separate documents; one certificate confirms both.
  • The Foreign Business Act B.E. 2542 deems a company “foreign” when ≥50% of shares are held by non-Thais. In restricted List 2/3 sectors this triggers FBL requirements or BOI promotion. Integrators must verify the actual shareholder nationality breakdown, not just the registered capital split.
  • DBD Biz Regist became the mandatory filing platform from 2026-01-01; all newly issued corporate documents will be electronic. Certified paper affidavits issued before this date remain valid; accept both formats but note the transition.
  • Thailand acceded to the Hague Apostille Convention (Cabinet approval 2025-12-09) but the Convention is not yet in force as of 2026-05-06 (pending deposit + ~6-month lead). Until entry into force, cross-border documents still require embassy/consular legalisation.