UK solicitors ask us this more than any other question. The short answer is yes — in the vast majority of cases, electronic signatures are fully legally binding in England and Wales. But there are important exceptions, and getting it wrong on the wrong document can have serious consequences.
The Legal Framework
The Electronic Communications Act 2000 confirmed that electronic signatures are admissible in legal proceedings as evidence of signing. Section 7 specifically provides that an electronic signature incorporated into an electronic communication is admissible in evidence.
The UK eIDAS Regulation (retained post-Brexit) establishes three tiers of electronic signature:
- Simple Electronic Signature (SES) — any data in electronic form used to sign. A typed name at the bottom of an email counts.
- Advanced Electronic Signature (AES) — uniquely linked to the signatory, capable of identifying them, created using data under their sole control, and linked to the signed data in a way that detects any subsequent change.
- Qualified Electronic Signature (QES) — an AES created using a qualified signature creation device and based on a qualified certificate.
The Law Commission Report on Electronic Execution of Documents (2019) confirmed that electronic signatures can be used to execute documents, including deeds, provided the relevant formalities are met.
What Can Be Signed Electronically
- ✓Contracts for services, employment contracts, tenancy agreements, commercial leases, NDAs, engagement letters, settlement agreements, share purchase agreements, loan agreements, powers of attorney (with witness requirements), company resolutions, HMRC 64-8 forms.
What Still Requires Wet Ink
- Wills — must be signed in the presence of two witnesses present at the same time
- Lasting Powers of Attorney — specific execution requirements under the Mental Capacity Act 2005
- Statutory declarations and affidavits sworn before a solicitor
- Documents requiring a notary's seal
The Witness Requirement for Deeds
A deed under English law requires the document to be clear it is intended as a deed, signed by the maker, and witnessed. The Law Commission confirmed electronic signatures on deeds are valid, but the witness must be physically present when the deed is signed. A remote witness via video call is not sufficient under current English law.
What Level of Electronic Signature Do You Need?
For most commercial documents, Simple or Advanced Electronic Signature is sufficient. Advanced is recommended for higher-value transactions where identity verification matters. SignFlow Now uses Advanced Electronic Signatures by default, with optional identity verification available for higher assurance situations.
Admissibility as Evidence
A validly executed electronic signature is admissible in English courts. What matters in practice is the audit trail. Can you demonstrate who signed, when they signed, that they intended to sign, and that the document hasn't been altered? SignFlow Now's Certificate of Completion includes a SHA-256 hash, full IP and device information, timestamp to the second, and a complete audit trail of every action taken on the document.
The Scottish Position
Scots law is different. The Requirements of Writing (Scotland) Act 1995 governs formal validity of documents in Scotland. For documents governed by Scots law, take separate Scottish legal advice on electronic execution requirements.
Practical Guidance for Solicitors
- Check your client care letter confirms acceptance of electronic signatures
- Build a checklist: what can be signed electronically, what requires a witness, what cannot be signed electronically
- Use a platform with a proper audit trail — not just a PDF with a typed name
- Consider identity verification for high-value matters
- Store the Certificate of Completion alongside the signed document
The Bottom Line
Electronic signatures are legally binding in the UK for the vast majority of documents. The exceptions — wills, LPAs, certain Land Registry transactions — are well-defined. The risks are not usually about whether the signature is valid. They're about whether you can prove it if challenged. That's why the audit trail matters as much as the signature itself.