**Why a two-party signature is not enough on a cross-border FIDIC / EPC** — contracts above quote on request (phone / LINE / email) M expose four risks that notarisation resolves: (1) **capacity** — the foreign contractor's director must prove signing authority under the parent's articles + board resolution; (2) **authenticity** — defeat the forged-signature defence; (3) **date certainty** — the notary's date stamp blocks back-dating disputes; (4) **cross-border enforceability** — HCCH Apostille makes the contract immediately usable before foreign courts and arbitral tribunals. Every Map Ta Phut / EEC / Industrial Estate deal closed by a Japanese, Korean, Chinese or German EPC contractor treats notarisation as a closing condition.
**FIDIC Red vs Yellow vs Silver vs Gold — which book, and how it changes the notarisation work** — **Red Book** (Construction, employer-design): owner designs, contractor builds against BOQ → the notary focuses on the variation-order mechanism and EOT procedure; **Yellow Book** (Plant & design-build): contractor designs and builds → notary focuses on the performance test and taking-over certificate; **Silver Book** (EPC / turnkey): lump-sum, single-point responsibility, used in power and petrochemical → notary focuses on reduced variation rights and the parent company guarantee; **Gold Book** (DBO, 20-year O&M) → notary focuses on the long-tail performance guarantee bond. Each book has different sub-clauses — our notary + construction lawyer screens them before signature.
**Foreign Business Act § 8(3) Annex 3 — construction is restricted** — construction is a restricted business under FBA Annex 3. A foreign contractor must obtain a **Foreign Business Licence (FBL)** from the Ministry of Commerce, structure a **genuine JV with ≥ 51% Thai shareholding**, or rely on **BOI / EEC / Treaty of Amity (US)** carve-outs. The notary must certify the **JV agreement, shareholders' agreement and any side letters** and verify there is no nominee structure (breach of FBA § 36 — three years' imprisonment + THB 1M fine). We refuse to notarise nominee structures outright.
**COE / COA licensing — how foreign engineers / architects can sign drawings in Thailand** — Engineering Profession Act B.E. 2542 § 7 + Architect Act B.E. 2543 § 7 require **design, supervision and signature of controlled-work drawings** to be performed by a holder of an **Associate / Professional / Senior Professional** licence from COE / COA. Foreign engineers can practise via (1) the **APEC Engineer Register** (currently seven disciplines); (2) the **ASEAN Chartered Professional Engineer (ACPE)** register; or (3) a **BOI / EEC special permit**. The notary certifies a statutory declaration confirming APEC / ACPE status + WP-3 work permit — preventing later disqualification of the design in court or by the municipality.
**Performance bond + parent company guarantee (PCG) — the three-layer structure lenders require** — EPC projects above USD 50M need: (1) **advance payment bond** (10–20% mobilisation) — on-demand bank guarantee under ICC URDG 758; (2) **performance bond** (10% contract value) — bank guarantee running to the end of the defects-liability period (12–24 months); (3) **PCG from the offshore parent** — notary + apostille + sworn translation. The notary verifies the **capacity of the parent's director, the conflict-of-laws clause and the submission to Thai jurisdiction or SIAC arbitration**.
**Dispute-resolution cascade — DAAB → amicable → SIAC / ICC / THAC** — FIDIC 2017 Sub-Clause 21 mandates a **Dispute Avoidance/Adjudication Board (DAAB)** as the first tier: 1–3 standing experts whose binding decisions issue within 84 days. Disputed decisions move to amicable settlement (28 days) and then **arbitration**: (a) **SIAC Singapore** (fast, 12–18 months); (b) **ICC Paris** (for deals > USD 100M); (c) **THAC Bangkok** (lowest cost). The notary certifies every submission and final award — enforceable in 168 NY Convention 1958 states.
**EIA / EHIA + building permit — the notary's statutory-declaration pack** — every project needs an **EIA approval** from ONEP (before contract signature), a **building permit (Form Or.1)** from the local authority (45 days), a **factory licence (Form Ror.4)** if industrial, and an **EEC special permit** if inside the EEC. The notary certifies a **statutory declaration from the project manager** confirming permit coverage — this is a condition precedent for lenders such as JBIC, IFC, ADB, SMBC and MUFG. Starting construction without EIA = up to five years' imprisonment (Environment Act § 100).
**Thailand's Apostille entry into force (28 February 2027) changes the route, not the recipient's rules** — before that date, documents for overseas use still need the legalisation route checked with the Department of Consular Affairs and the destination embassy. After it, HCCH contracting states accept an Apostille in place of legalisation only for public documents within the Convention's scope; courts, tribunals, lenders and employers can still set their own format, translation and content requirements. Confirm the checklist with the recipient before signing.
**Force majeure + COVID lesson + geopolitical risk** — Sub-Clause 18 (Exceptional Events) covers war, terrorism, **epidemics / pandemics** (post-COVID amendment), **government sanctions** (Russia / Iran / Myanmar), natural catastrophe and strikes. The notarised notice of FM + mitigation plan + cost/time impact assessment must issue within 14 days of the trigger — late notice = waiver of the EOT / cost claim. We hold the bilingual template and notarise the notice within 24 h.
**Cost and turnaround**: quoted after we see the drafts, based on document count, languages, number of signatories and the destination's authentication route (phone / LINE / email). We never charge a percentage of contract value, and timing depends on government, embassy and signatory availability.
**Retention + PDPA**: file retained **10 years** (AMLA § 22 + Revenue Code § 19 + CCC § 193/30 statute of limitations). PDPA § 26 purpose-limitation. ISO 27001 + AES-256. Disclosure only to client + lender + DAAB / arbitrator + court order.
