Built for UK residents who need a professional voice
Every year, millions of UK residents face everyday disputes — a landlord who ignores repair requests, an unfair parking fine, an NHS complaint that goes unheard, a deposit that never gets returned. Most people know they have every right to complain. But writing a formal letter that is clear, professional, and actually gets results is surprisingly hard.
Hiring a solicitor costs hundreds of pounds. Asking a friend rarely produces a letter that works. Generic templates online are impersonal and often miss the key details. And using a general AI tool requires knowing what to ask — most people don't know what a good letter looks like, which is exactly the problem.
LetterSure was built to solve this. A guided form that asks the right questions, an AI that knows UK letter conventions, and a result that is ready to download and send in under three minutes.
LetterSure generates personal correspondence letters for everyday UK situations. Our letters are professional, clearly written, and formatted correctly for UK correspondence. They are designed to help you communicate your situation clearly and assertively.
LetterSure is not a law firm and does not provide legal advice. Our letters do not cite legislation, make legal claims, or constitute legal documents. For matters that require legal representation, we always direct users to qualified solicitors via the Law Society.
This distinction is important to us. We have built guardrails into every letter we generate to ensure no legal language appears in our output — protecting both our users and the integrity of the service.
Built on proven AI
LetterSure uses Claude, one of the most capable and safety-focused AI models available, developed by Anthropic. Every letter is generated fresh for your specific situation — not pulled from a template library.
UK-specific by design
Our prompts, formatting, and tone guidance are built specifically for UK correspondence. British English, correct UK address formatting, appropriate sign-offs, and an understanding of UK-specific situations.
Guardrails on every letter
Every letter generated by LetterSure goes through an automated check that blocks legal language, legislation citations, and legal threats. If a request falls outside our service, we tell the user clearly and direct them to appropriate help.
Your data is not stored
The details you enter to generate your letter are used only to create that letter. We do not store your letter content after delivery. Full details are in our Privacy Policy.
LetterSure is used by UK residents dealing with everyday disputes and correspondence situations. Our most common users are tenants writing to landlords about repairs or deposit deductions, people challenging parking fines, patients making NHS complaints, employees raising workplace grievances, and consumers disputing bills or requesting refunds.
LetterSure Pro is also used by people managing ongoing disputes — where multiple letters are needed over weeks or months. The £12.99/month subscription gives unlimited access, making it cost-effective for anyone dealing with a protracted situation.
Ready to write your letter?
Join thousands of UK residents using LetterSure to communicate confidently.
Write a letter now — from £6.99Questions? Contact us at support@lettersure.co.uk