eSignature legality summary
A written signature is not required for a valid contract — parties can agree verbally, electronically, or on paper. The ETA confirms a contract is not unenforceable merely for being electronic, and electronic records are admissible under the Evidence Act (ss. 35A, 62). Brunei applies a tiered approach with a “Secure Electronic Signature.”
Types of permitted electronic signature
An ordinary electronic signature is valid; a “Secure Electronic Signature” (via a prescribed or agreed security procedure) is unique to and identifies the person, is under their sole control, and is linked so that any change invalidates it — and is presumed authentic, shifting the burden to a challenger. A “Secure Digital Signature” uses a valid certificate from a government-certified provider.
Documents that may be signed electronically
Suitable for HR documents, commercial agreements between corporate entities (NDAs, procurement, sales), and consumer agreements.
Use with caution / not typically appropriate
A Secure Electronic Signature is not required for any transaction but adds an authenticity presumption; matters requiring wet ink or a notarial process are excluded.
- Instruments under written law relating to Islamic law
- Wills
- Negotiable instruments
- Indentures
- Declarations of trust (except constructive and resulting)
- Powers of attorney
- Contracts for the sale or disposition of immovable property, conveyances, and documents of title to such property
Seminal court cases
None reported.
Primary sources
Disclaimer: This guide is general information, not legal advice, and is not a guarantee that any signature will be enforceable for a particular document, transaction, or jurisdiction. E-signature and data-protection laws change frequently. Confirm the requirements for your specific document and parties, and consult a licensed lawyer in the relevant country before relying on electronic signing.
Last reviewed: June 15, 2026