AI-generated tenant complaints: the complete guide for letting agents

What counts as an AI-generated complaint

An AI-generated complaint is one a tenant has written with a general-purpose AI tool such as ChatGPT, Copilot or Gemini. Usually they describe what’s gone wrong, ask the tool to “write a formal complaint”, and send what comes back, sometimes after asking it to make the letter firmer or “add the law”.

Most are better described as AI-assisted: the facts are the tenant’s, the structure and the legal framing are the tool’s. They often share a few features:

• numbered headings and a formal register (“I am writing to raise a formal complaint regarding…”);
• Acts and sections named, sometimes with deadlines or penalties attached;
• a compensation figure, and a demand for a reply within a set number of days;
• a warning that the complaint will go to the Property Ombudsman or the county court;
• the same point made two or three times in different words.

None of that proves a tool was used. Plenty of people write this way, and plenty of AI-assisted complaints look nothing like it. In practice it matters less than it seems: you answer the complaint, not the software that helped write it.

Why letting agents are seeing more of them

Three things have come together.

Writing a formal complaint now costs nothing. A tenant who once would have phoned, or sent two lines by email, can produce four pages of structured argument in a minute. The effort that used to limit the length and formality of a complaint has gone.

The tools tend to side with whoever is asking. A chatbot asked to argue a tenant’s case will argue it. One former president of ARLA Propertymark described AI as “very much user-biased” (Mortgage Solutions, August 2026). It will find the strongest-sounding version of the argument, whether or not the law supports it.

The law has just changed. The Renters’ Rights Act 2025 changed how private tenancies work in England from 1 May 2026, and more changes are still to come. That gives a tool plenty of old and new rules to mix up, and plenty of proposals that never became law to mistake for the real thing.

Letting agents and their trade body have been reporting the effect since late 2025: longer, more assertive complaints, some accurate and some built on outdated or misapplied law. We’ve collected what’s been published, and what hasn’t been measured yet, in AI-generated tenant complaints in 2026.

Why polished wording doesn’t make a claim correct

A language model writes what reads plausibly. That makes its legal claims sound certain whether they’re right or not. In tenant complaints, the same kinds of mistake come up again and again:

• Deadlines that aren’t in the Act. “You must fix a total loss of heating within 24 hours.” Section 11 of the Landlord and Tenant Act 1985 requires the landlord to keep the heating in repair; it doesn’t set a number of hours or days.
• Remedies described as automatic. “I am entitled to three times my deposit.” Under section 214 of the Housing Act 2004 a court orders between one and three times the deposit, on the tenant’s application, if the rules weren’t followed. It isn’t automatic.
• Law from the wrong place. Welsh and Scottish housing law turn up in complaints about homes in England.
• Law that never passed. The Renters (Reform) Bill fell when Parliament was dissolved in May 2024. It still gets quoted as if it were in force.
• Rules for someone else. Awaab’s Law timescales currently apply to social landlords, not private lets.
• The wrong version. A rule that changed on 1 May 2026 applied differently to events before that date.

Just as often, the tool is right. Complaints that cite the repairing duty in section 11, the 30-day deposit protection rule or the duty to give the landlord’s name and address are frequently correct. That is the point: each claim needs checking, not accepting or dismissing as a batch. Seven common examples are checked one by one in When an AI complaint quotes the wrong law.

Step 1: Find the grievance underneath the wording

Before you think about the law, reduce the complaint to plain facts: what happened, when, and what the tenant wants. The formal language can make a simple problem look like five.

Keep the tenant’s own words alongside your summary. When you reply, you’ll want to show you read what they actually wrote.

Propertymark’s advice to agents in December 2025 made a point worth holding on to: even if a complaint looks AI-generated, it usually exists because something has gone wrong (Letting Agent Today).

Step 2: Separate every allegation

One letter often raises several issues, and one issue often contains several points. Write each point on its own line and sort it into one of four kinds:

• What happened: “I reported the boiler on 4 January.” Checked against your records.
• What the law requires: “You must repair it within 24 hours.” Checked against the legislation.
• How the complaint was handled: “Nobody replied to my email of 2 June.” Checked against your inbox and your procedure.
• What they want: “£1,500 compensation.” Decided by you, on the facts.

Then group the points by issue (heating, damp, the deposit, a fee) and mark any that repeat an earlier one. You’ll usually find a long complaint comes down to three to six issues. For more on this step, see separating the issues in a complaint.

Step 3: Check each legal claim against the legislation itself

For each point that says what the law requires, find the provision on legislation.gov.uk, the official home of UK legislation, and check four things:

1. Does it say what’s claimed? Read the words. A duty to repair isn’t a duty to repair within a set time; a court’s power to order a payment isn’t an automatic entitlement.
2. Does it apply in England? Be careful: Acts of the Senedd can show their extent as “England and Wales”, because that’s one legal jurisdiction, while only applying in Wales.
3. Was it in force when the events happened? Use the point-in-time version for the date of the events. Much of the Renters’ Rights Act 2025 applies to private tenancies only from 1 May 2026.
4. Is it law, or guidance? Government guidance and redress scheme codes matter, but they aren’t Acts of Parliament. Don’t let one stand in for the other.

Then record what you found: the claim is supported, partly supported, depends on the facts, or isn’t supported by what you checked. The last isn’t the same as “the tenant is wrong”; it means you won’t repeat the claim as fact. The full method, with worked examples, is in the verification guide, and there’s more background in checking legal claims in a complaint.

Step 4: Work out what happened from your records

Most complaints are decided on records, not on law. For each issue, list what would settle it, then pull those records before you write anything:

• when the problem was first reported, and how (repair log, emails, call notes);
• what was done and when: contractor visits, job sheets, parts ordered, the date it was fixed;
• certificates: the gas safety record, the electrical safety report, the deposit protection certificate and prescribed information;
• notices you served, rent statements, invoices and the tenancy agreement;
• what you’ve already told the tenant.

Put the dates in order: reported, acknowledged, attended, fixed. Gaps and delays become obvious, and so do the places where the complaint and your records disagree. Where they do, say what your records show, and don’t guess at what you can’t find. See records to gather for a complaint.

Step 5: Decide each issue

Decide each issue on its own. The usual outcomes are:

• Upheld: you or the landlord fell short. Say so, and say what you’ll do.
• Partly upheld: some of it stands. Say which part.
• Not upheld: explain why, from the evidence.
• Need more information: from the tenant, the landlord or a contractor. Say what, from whom and by when.
• Escalate: to the landlord, a manager, or a solicitor.

Involve the landlord where the decision is theirs: authorising works, refunding money they received, or paying compensation. Take legal advice where there’s real legal risk, such as possession, allegations of harassment or illegal eviction, discrimination, or significant sums.

Decide compensation from the facts: how long the problem lasted, its effect and what you’ve already done. Don’t start from the tenant’s figure, or from a figure a chatbot produced.

Step 6: Reply in plain English, point by point

Don’t answer formal language with more formal language. A clear, calm reply is easier to read, harder to dispute, and reads better if a redress scheme looks at it later.

• Answer the issues in the order the tenant raised them, one short part each.
• For each: what they raised, what you found, your decision, and what happens next and when.
• Where they cited the law, say what the provision actually says. For example: “Section 11 of the Landlord and Tenant Act 1985 requires the landlord to keep the heating in repair. It doesn’t set a fixed number of hours, but we accept that seventeen days was too long.”
• Where you couldn’t support a claim, say what you checked rather than calling it wrong: “We’ve checked the Housing Act 2004. It allows a court to order a payment on an application; it doesn’t provide for an automatic penalty.”
• Never describe the complaint as “AI-generated”. It reads as dismissive and it isn’t relevant.
• End with your internal review step and your redress scheme’s details.

There’s a step-by-step version in how to respond to an AI-generated complaint, and free wording to adapt in our response templates.

Step 7: Close it, and learn from it

Diary every action you promised and keep the complaint, your records and your reply together: if the complaint goes further, that file is your case. Then look for patterns. If AI-written complaints keep citing the same rule, check your repair timescales, your templates or your tenancy paperwork against it. The tenant may have been wrong about the law and still pointed at something worth fixing.

Should you use AI to answer them?

Using software to summarise a long complaint and organise the points is sensible, and agents quoted in the trade press describe doing exactly that while keeping the reply itself in human hands (Letting Agent Today, August 2026). Three cautions if you reach for a general chatbot:

• Personal data. A complaint is full of it. Before pasting one into any tool, check whether its terms let the provider keep or reuse what you send, and whether that fits your obligations as a controller under UK GDPR.
• The same accuracy problem. A chatbot asked to answer a complaint can agree with a claim that isn’t in any legislation, or invent a section of its own.
• The decision has to be yours. Propertymark’s guidance is that final decisions rest with a trained professional.

Casebriar was built around those three points: it checks each legal claim against the legislation before anything is written, waits for your decision on every issue, and acts as your processor with complaint content erased on your schedule. See how it compares with a general chatbot.

Should you ask the tenant if they used AI?

There’s no need. It doesn’t change your obligation to consider the complaint properly, and asking can come across as a way of not taking it seriously. A former ARLA Propertymark president has suggested the redress schemes could ask complainants to disclose AI use; that’s a debate for the schemes. In the meantime, judge the substance, and let your reply show you’ve checked it.

A checklist for the next one

1. Log the date it arrived and send a short acknowledgement with your timescale.
2. Rewrite each point in plain words, keeping the tenant’s own wording alongside.
3. Sort each point: what happened, what the law requires, handling, or what they want.
4. Group the points into issues and cross out repeats.
5. Check every legal claim: does it say that, apply in England, and apply on those dates? Is it law or guidance?
6. List and pull the records each issue needs. Put the dates in order.
7. Decide each issue, involving the landlord where it’s their call.
8. Reply in plain English, one part per issue, with what happens next.
9. Include your internal review step and redress scheme details.
10. Diary what you promised, and keep the file together.

Want a quick look at what a complaint relies on first? Paste it into the free complaint checker, which runs entirely in your browser.