Your customers are now writing complaints with ChatGPT. Here's what changes for your CX team.

A complaints handler at one of our housing clients opened an email last week and found something new in it. Above the actual complaint, the customer had pasted the mid-conversation ChatGPT prompts they’d used to draft it.

That email isn’t an outlier. Three of our clients, in social housing and insurance independently raised the same pattern in our May catch-ups. None of them was prompted. But what surprised me isn’t that the complaints have increased in volume or became more professional. The surprise is what that’s doing to upheld rates.

What an AI-drafted complaint actually looks like in 2026

Complaints used to arrive angry and scattered. Now they arrive organised. The team at an FCA-regulated insurer we work with, told us customers have started using vulnerability language strategically — wording that, under the Consumer Duty, an insurer is obliged to act on the moment it appears.

They cite the rules now, too. Statutes, regulator codes and Consumer Duty references used to turn up in an appeal letter, months in, if at all. Now they’re in paragraph two of the first email. Matt Thundercliffe, who heads CX and complaints at Beyond Housing: “we get a much higher volume of complaints now that are referencing specific legislation… the strength of feeling has increased.”

And sometimes — as with the email this piece opened with — you can literally see the tool at work, prompts and all. Nobody’s embarrassed about using ChatGPT to complain. It worked.

The thing nobody expected: the upheld rate is dropping

At Beyond Housing, complaint volume is up — and the proportion of complaints they uphold is down. Under the Housing Ombudsman’s complaint handling code, every complaint gets a decision: upheld means the organisation found a genuine service failure. Matt’s team is finding fewer of them, in a bigger pile.

Two things explain this, and it’s not the cynical “AI complaints are easy to dismiss.”

First, AI removed the cost of complaining. The customer who’d never have spent an evening writing 600 words now produces them in two minutes — including customers whose grievance, properly investigated, isn’t a service failure at all. The pile grows faster than the failures in it.

Second — and this is Matt’s own explanation — the genuine failures are increasingly getting caught before they become complaints, through feedback picked up just after a repair or an ASB report and acted on while it’s still fixable.

(He’s careful to call this his observation of a trend, not a provable attribution… See Beyond Housing’s case study for the bigger picture). Most importantly, however good your VOC platform is, it can’t cause good culture and processes… That’s something only your people can do.

What’s changed for complaints teams?

The teams we’re working with are seeing three shifts:

You can’t triage on vibes

Polish used to mean effort, and effort meant probably-serious. “I’m absolutely fuming” meant probably-venting… But polish is now free.

A complaint that opens with three paragraphs of Consumer Duty framing might be your most serious case of the quarter or a two-minute punt, but nothing about the prose will tell you which. Triage has to read for the substance: what happened, when, and whether it’s checkable.

The first email can start a clock

The person opening the complaint used to know the rules better than the person who wrote it. Not any more. The first email now arrives citing Awaab’s Law timescales, or disclosing a vulnerability in Consumer-Duty-fluent wording — and some of those sentences create obligations the moment they land. A disclosed vulnerability has to be acted on whether or not anyone senior has read the email yet. A missed ombudsman deadline costs £650 a case, win or lose.

The old world — frontline deals with it, compliance gets involved if it escalates — breaks exactly when the first email is the one with legal weight in it. Handlers don’t need to be lawyers. They need to recognise the handful of citations that change what happens next, and have somewhere to send them today.

Volume stops being your number

Complaint volume is going up for reasons out of your control. Reporting that to the board as a performance measure is reporting the weather. The numbers that actually say whether complaints are being handled well: upheld rate, where in the process complaints get resolved, and cost per upheld outcome. i

We’ve written more about why volume is the wrong metric to optimise for, and the Ombudsman has floated the idea of alternative fee models that ‘recognise positive complaint handling’ in their 2026-2027 business plan.

So what do you actually do about it?

The strength of feeling has increased. The articulacy has too. And the old shortcuts for telling a serious complaint from a venting one are gone.

The first practical thing you can do is shift your metrics: Stop reporting complaint volume as if it’s entirely in your control. Start reporting upheld rate, stage of resolution, and (when you can defensibly estimate it) cost per upheld outcome.

Second, The right time to close complaints is before they happen. This is “Stage Zero” of complaint handling: pick up dissatisfaction in feedback, right after the repair or the renewal, and fix it while it’s still a conversation.

A platform like CustomerSure can’t reduce AI-drafted complaints; nothing will. But it can prevent small issues becoming upheld complaints: the unhappy tenant heard a week before the Housing Ombudsman submission, the confused insurance customer caught before the deadline fees start. That’s closed-loop feedback, and it’s in your control.

Catch dissatisfaction before it becomes a Consumer Duty complaint.

If you want to talk about what earlier signal capture looks like in housing or financial services specifically — what the surveys are shaped like, where they sit in the journey, and what changes once they're running alongside your complaints inbox — we're happy to walk through it.

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