Legal framework in United Kingdom
The Electronic Communications Act 2000 and the eIDAS Regulation retained after Brexit (UK eIDAS) govern electronic signatures, with three levels: simple, advanced and qualified. A signature is binding when there is clear intent to sign.
Legal framework
Electronic Communications Act 2000 and UK eIDAS
How the legal framework evolved in United Kingdom
2000
Electronic Communications Act: the legal basis for electronic signatures in the UK.
2019
The Law Commission formally confirms the validity of electronic signatures under English law.
2023
Electronic Trade Documents Act: negotiable trade documents (like bills of lading) can be 100% electronic.
Types of electronic signature in United Kingdom
Simple electronic signature
English law is among the most flexible in the world: the Law Commission confirmed in 2019 that an electronic signature is valid for the vast majority of documents, provided there is intent to sign — which Firmiu's audit trail documents.
Advanced and qualified signatures (UK eIDAS)
The UK retained the eIDAS scheme after Brexit as 'UK eIDAS'. The advanced and qualified tiers add certificates, but are rarely mandatory for private contracts.
Deeds
Deeds can be signed electronically, but they still require a witness present to attest the signature.
What makes a signature valid in United Kingdom?
For most private agreements a simple or advanced electronic signature is enough; the qualified one is equivalent to a handwritten signature. Firmiu provides the audit trail that proves identity and integrity.
Which documents can you sign in United Kingdom?
Can be signed electronically
- Commercial and service contracts
- Tenancy agreements
- Employment contracts and offer letters
- Non-disclosure agreements (NDAs)
- Estimates and purchase orders
- International trade documents (since the ETDA 2023, even bills of lading)
Usually require a notary or handwritten signature
- Wills
- Deeds without a witness present
- Registered land transfers (save the Land Registry's specific procedures)
- Statutory declarations with special requirements
These lists are indicative: the document type and applicable law determine each case.
How to sign documents in United Kingdom
Upload your PDF
Upload the document and enter the name and email of the person who must sign.
The signer receives a link
They get an email with a unique link and a verification code.
Signed document
The PDF is signed with its audit trail, ready to download.
Frequently asked questions
- Are electronic signatures legal in the UK?
- Yes. The Electronic Communications Act 2000 and UK eIDAS grant them full validity.
- Did anything change after Brexit?
- Not in essence: the UK retained the eIDAS framework as UK eIDAS.
- Do they work for commercial contracts?
- Yes, they are widely used in private contracts and agreements.
- What changed with Brexit for electronic signatures?
- The UK incorporated eIDAS into domestic law as 'UK eIDAS', so the practical scheme remains: a simple electronic signature is valid and cannot be rejected for being electronic.
- Can I sign a tenancy agreement electronically?
- Yes. Ordinary tenancy agreements are routinely signed electronically; leases that constitute deeds additionally require a witness.
- What is the Electronic Trade Documents Act 2023?
- A pioneering law giving legal effect to negotiable electronic trade documents — bills of lading, promissory notes — removing paper from international trade.
- Does HMRC accept electronically signed documents?
- HMRC accepts e-signatures on numerous forms. For private contracts, validity doesn't depend on HMRC.
Official sources
The information on this page is general in nature and does not constitute legal advice. The validity of an electronic signature depends on the applicable legislation and the document type; for specific cases, consult a legal professional.
Guide reviewed and updated: July 2026.
Electronic signatures by profession
Guides for the industries that sign the most documents in United Kingdom.
Related guides
Are electronic signatures legal? What you need to know
Electronic signatures are legal across Latin America, Spain and the United States. Here's what makes them valid and where they're recognized.
Types of electronic signature: simple, advanced and qualified
Not all electronic signatures are the same. Here are the three levels and which one you need for each document.
What documents can you sign electronically
Electronic signatures work for far more documents than you'd think. Here are the most common ones and the exceptions.
Electronic signature in other countries
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