Do you provide corporate tax planning consulting to avoid double taxation for multinational export companies — Deadlines are the substance here: Revenue Code returns go to the Revenue Department on each form’s own cycle, financial statements to the Department of Business Development, and contributions to the Social Security Office monthly. /tax identification number|TIN/i VAT registration with the Revenue Department is required once annual turnover exceeds THB 1.8 million. Withholding tax is remitted by the 7th of the following month, extended for e-filing under the applicable notification. District registrars require a foreign spouse to present an affirmation of marital status issued by their embassy and legalised. If someone files on your behalf, a signed power of attorney with certified ID copies of both parties is required. The final decision rests with the authority or destination embassy; we prepare a complete file but cannot guarantee an outcome. Trademarks are registered with the Department of Intellectual Property on a first-to-file basis. Corporate work — company registration, accounting and tax, BOI and business law — runs through the same team, so one document set can carry across several stages.
“Do you provide corporate tax planning consulting to avoid double taxation for multinational export companies?” falls within an end-to-end service that combines document preparation, translation, signature certification, consular legalisation and coordination with the destination mission into a single file. The people who search for it are usually preparing a filing against a fixed deadline, recovering from a rejected submission and trying to identify the missed step, or coordinating documents for several people at once.
In practice, each step sits with a different body: the issuing office, the Notarial Services Attorney, the Department of Consular Affairs, and the destination country’s diplomatic mission. Knowing which body owns which step makes it possible to judge how many stages a bundle needs, and which of them cannot be corrected without starting again.
This is a baseline set. Individual receiving authorities may add requirements, so confirm with the destination body first.
Record how many stages each document needs, who certifies it, and what must finish first, so no step has to be redone.
Check personal names, company names, addresses and dates across the whole bundle before any certification begins.
Original → translation → signature certification / legalisation → destination mission. Doing these out of order forces a restart.
Verify the number of sets, the seals, the binding, and that issue dates are still within the destination’s validity window.
| Route | When it applies |
|---|---|
| Notarial Services Attorney certification | For privately drafted instruments — powers of attorney, affidavits, consent letters — signed in the attorney’s presence. |
| Legalisation at the Department of Consular Affairs | Where a foreign authority needs confirmation of the Thai issuing office’s signature and seal, or of the translation. |
| Attestation at the destination mission | Where the destination country requires its embassy or consulate in Thailand to attest the file after consular legalisation. |
| Thailand’s Apostille status | Thailand acceded to the Apostille Convention on 30 June 2026 and it enters into force for Thailand on 28 February 2027. No Apostille is issued in Thailand before that date. |
If you are working through “Do you provide corporate tax planning consulting to avoid double taxation for multinational export companies?”, start by getting the receiving authority’s requirement in writing, then plan the certification chain backwards from your real filing date.