E-Notary and Digital Signatures: Which Documents Can Be Signed Online and Which Still Need In-Person Notarisation

How Thai law treats electronic signatures

The Electronic Transactions Act B.E. 2544 establishes that information is not denied legal effect solely because it is in electronic form. Where the law requires a signature, an electronic signature that identifies the signer and uses a reliable method is treated as satisfying that requirement.

The Act distinguishes ordinary electronic signatures — a typed name, a signature drawn on a tablet, a click-to-accept — from reliable electronic signatures that are uniquely linked to the signer and make later alterations detectable, such as certificate-based digital signatures issued through a certification authority. The Electronic Transactions Development Agency (ETDA) publishes the standards and guidelines that apply.

Certain transactions are excluded from automatic application of these rules, and some juristic acts — particularly those that must be registered with an official — must still follow the form prescribed by the specific law. A contract that can be signed digitally does not mean every document can be. Land transactions, for example, follow the Land Department's procedures regardless of how the underlying agreement was signed.

In practice, the strength of an electronic signature as evidence depends on the audit trail: who signed, when, from which verified identity, and whether the document changed afterwards. Platforms that record these details and certificate-based signatures carry far more weight in a dispute than a pasted image of a handwritten signature.

Why notarisation in Thailand is still done in person

Notarial certification in Thailand is carried out by lawyers trained and registered with the Lawyers Council of Thailand as notarial services attorneys. The core of the work is confirming that the signer is the person named and is signing voluntarily, which is currently done by checking original identification and witnessing the signature in person.

Some jurisdictions — many US states, for example — have laws enabling Remote Online Notarization, under which a notary commissioned in that state may notarise over audio-video technology. Those regimes are tied to the law of the commissioning state; they do not extend video notarisation powers to notaries in Thailand.

We therefore use video meetings to review drafts, explain content, and prepare everything before the appointment, while the signature that requires certification is made before the notarial services attorney. Signers living abroad can sign before a notary or a Thai embassy official where they are, and we coordinate the rest.

This approach is not caution for its own sake. A notarial certificate that a foreign bank, registry, or court later doubts creates far more delay than a short in-person appointment. Getting the certification beyond question is what saves time across borders.

Choosing a signing format the recipient will accept

The important question is not whether you can sign online, but who will receive the document and what format they accept. Foreign banks, company registries, courts, and embassies each set their own policy, and the same institution may treat different document types differently.

• Commercial contracts between companies: electronic signatures are commonly acceptable if the parties agree and the platform keeps a signing record.
• Filings with foreign company registries: some accept certificate-based digital signatures; others still require a notarised paper original.
• Powers of attorney for land or banking transactions: almost always require an original signed before a notary or official.
• Documents to be legalised by the Department of Consular Affairs or an embassy: handled as paper originals.
• After 28 February 2027, when the Apostille Convention enters into force for Thailand, check whether Thailand issues e-Apostilles before planning a fully digital route.

Certified true copies and affidavits in a digital-first world

International financial transactions — opening an overseas account, or KYC checks by a foreign institution — often require copies of passports or company documents certified as true copies of the original. The certifying attorney compares the copy against the physical original before certifying, so a scan alone is not enough.

An affidavit is a statement of facts by the deponent, signed before the certifying officer. It is used for matters such as confirming variant spellings of a name, single status, or the source of funds. The deponent is responsible for the truth of the statement, and we do not draft statements the signer cannot confirm.

Once the certified paper version exists, we provide a high-resolution scan immediately and send the original by tracked international courier, so the recipient can begin its review without waiting for the parcel.

For recurring KYC requests, keep a short record of which institution received which certified copy and when. Many institutions accept certified copies only within a set period after certification, and planning batches avoids repeat appointments.

A hybrid online and in-person workflow

This approach minimises time spent in the office without weakening the certification.

1. 1. Send the documents and name the receiving authority; we check whether it accepts digital or paper.

2. 2. Hold a video meeting to review the draft

   explain the content, and pre-check identity details.

3. 3. Correct the draft so names

   document numbers, and dates match every supporting record.

4. 4. Sign before the notarial services attorney with original ID

   or follow our guidance to sign before a notary abroad.

5. 5. Legalise at the Department of Consular Affairs and embassy where the destination requires it.

6. 6. Receive scans immediately and the original by tracked courier.

Our role, and what we do not do

We assess which signing format suits your document, draft and translate bilingual documents, arrange signing before a notarial services attorney, prepare certified true copies and affidavits, and coordinate Department of Consular Affairs and embassy legalisation.

We do not certify signatures over video in place of personal appearance, we do not certify copies from scans without seeing the original, and we do not promise that a receiving authority will accept a document; acceptance is that authority's decision.

Whether a particular contract is enforceable under a foreign law is a question for a lawyer qualified in that jurisdiction, and we will refer you rather than guess.

A typical engagement for an overseas client takes one video call, one in-person signing appointment, and, where needed, legalisation. Clients who cannot travel to Thailand sign abroad, and we prepare the Thai-side translations and checks so the foreign notary receives a document ready to sign.

Common real-world scenarios and the format that fits

A Thai company signing a distribution agreement with a European partner can usually sign through an electronic signature platform without meeting, because both Thai and EU law recognise electronic signatures and the parties decide what they accept. Keep the platform's signing report and confirm that the signer has authority under the company affidavit.

A foreign shareholder of a Thai company who lives abroad and must sign filings for the Department of Business Development typically signs before a notary where they live, followed by authentication at a Thai embassy or consulate as the receiving office requires, and then sends the original to Thailand. A correct bilingual draft prepared in Thailand first avoids documents travelling back and forth.

The pattern is consistent: the more a document is tied to property, public registers, or cross-border legalisation, the more likely it needs a paper original certified in person. Private commercial contracts are where electronic signatures are most widely usable.

Frequently asked questions