Business surface intelligence for UK companies

Email footer legal requirements for UK companies

Every business email a UK company sends must carry the company's registered name, because the 2015 Regulations require the name on "all other forms of its business correspondence and documentation" and define documents to include electronic ones. Any email that does the work of a business letter must also carry the registered number, the part of the UK where the company is registered and the registered office address. A disclaimer is not required by any law.

Key facts

• Registered name on all business correspondence, in any form (regulations 24(1)(g) and 29(c)).
• Registered number, place of registration and registered office on business letters (regulation 25), and a business letter sent as an email is still a business letter (regulation 29(c)).
• If an email that is a business letter names one director other than as the signatory or in the text, it must name all of them (regulation 26).
• LLPs: the same, with the LLP's name, number and registered office.
• Sole traders and partnerships trading under a business name: your own name and a service address on business letters, orders, invoices, receipts and demands (Companies Act 2006, section 1202).
• Nothing requires a confidentiality notice, a disclaimer, a logo or a phone number.

Which emails count

The regulations distinguish two tiers.

All business correspondence needs the registered name. That is any email sent in the course of business: a reply to an enquiry, a note to a supplier, a quote, an internal-looking message to a contractor. Regulation 24(1) lists letters, notices, order forms, invoices, demands for payment, receipts and "all other forms of its business correspondence and documentation", and regulation 29(c) says a reference to any type of document covers that document "in hard copy, electronic or any other form".

Business letters, order forms and websites need the further particulars in regulation 25: where the company is registered, its number and its registered office. An email that would have been a letter on paper (a formal offer, a contract note, a demand, a complaint response) is a business letter in electronic form. The regulations do not define "business letter", so there is a grey area around short conversational messages. The way out of the grey area costs nothing: put the full line in the default signature of every account.

The director-names trap

Regulation 26 says that where a business letter includes the name of any director, other than in the text or as a signatory, it must disclose the name of every director. A signature block that reads "Jane Example, Director" is a signatory, which is fine. A footer that says "Directors: J. Example" and stops there, when there are three directors, is a breach. Either name them all or name none.

What a compliant signature looks like

Jane Example, Director Example Trading Limited, registered in England and Wales, company number 01234567. Registered office: 1 Example Street, Exampletown, EX1 2MP.

Add the VAT number if you issue invoices by email, since VAT invoices must carry it. Add a trading name before the registered name if you use one: "Brand is a trading name of Example Trading Limited". The template page has variants for Scotland, Northern Ireland, LLPs and sole traders.

What is not required

A confidentiality notice does not make an email confidential and is not required by UK law. A disclaimer of liability has little effect on a contract already formed in the body of the email. "Please consider the environment" is neither required nor measurable. None of these does harm, except by burying the line that does matter.

Penalties

Non-compliance without reasonable excuse is an offence by the company and every officer in default, with a fine of up to level 3 on the standard scale (£1,000) and a daily default fine for continued contravention (regulation 28). Under section 83 of the Companies Act 2006 a company in breach may find a contract claim dismissed if the other side shows it was prejudiced by the breach. Prosecutions over email footers are, as far as the public record shows, unknown; the practical cost is that a recipient checking who sent the message cannot find out.

How Observes reads this

Email footers are not something Observes fetches; websites are. But the same disclosure line, in the same words, on the site and in the mail, is what lets a recipient confirm that the email domain, the website and the legal entity are one business. Supplier-impersonation fraud lives in the gap between those three. A footer that names the registered company and its number, on both, closes it. Verifying a business email domain covers the other side of that check.

This page is general information about UK company law, not legal advice. The regulations were checked on the date shown below; check legislation.gov.uk for changes after that.

Written by Nathan. Last reviewed 8 October 2026.