Why does ChatGPT say wrong things about my brand?

Hallucinations are caused by inconsistent signals between your website, social media and third-party directories. AI mixes this contradictory data.

How to prevent ChatGPT from giving wrong information about my business?

Harmonize your information across all profiles, add Organization JSON-LD schema with sameAs links, and create a factual page serving as the source of truth.

2026-04-088 minUrgent issue

ChatGPT says wrong things about my brand: how to fix AI hallucinations

Cyril Cretin

Founder RadarLLM.ai

ChatGPT associates your brand with the wrong products. Gemini shows an outdated address. Perplexity quotes prices that no longer exist. AI hallucinations aren’t just an annoyance — they’re sending your customers to competitors.

Why do AIs get your brand wrong?

LLMs build their understanding of your brand from ALL available web sources: your website, social media, directories, customer reviews, press articles, and even forum comments. When these sources contradict each other, AI "hallucinates" — it generates an answer by mixing inconsistent data.

Main causes: outdated information on third-party directories (old phone number, old address), different business descriptions across your website vs LinkedIn vs Google Business, and the lack of a clear entity signal that "anchors" the truth.

The 4 most common hallucination types

1. Wrong attribution

AI attributes products or services you don’t offer. Cause: vague or missing descriptions on your site, outdated third-party content.

"This company also offers legal consulting" — when you’re a plumber.

2. Outdated information

AI cites old prices, former address, old phone number. Cause: directory listings and online profiles haven’t been updated.

"Located at 12 Voltaire Street" — when you moved 2 years ago.

3. Entity confusion

AI confuses your brand with another of the same name or sector. Cause: no Organization schema, no sameAs link to Wikidata or Crunchbase.

"RadarLLM is an SEO agency founded in 2015" — confusion with another company.

4. Biased sentiment

AI presents your brand with a negative or neutral tone despite good reputation. Cause: highly visible negative reviews, lack of structured positive content.

"Reviews are mixed" — when you have 4.8/5 across 200 reviews.

How to fix hallucinations in 6 steps

Harmonize your NAP (Name, Address, Phone) across ALL profiles: website, Google Business, LinkedIn, Yelp, Trustpilot, industry directories.

Create an ultra-factual "Fact Sheet" page on your site: founding date, exact services, geographic area, key figures, team. This is your "source of truth."

Add a complete Organization JSON-LD schema with sameAs pointing to your verified profiles (LinkedIn, Wikidata, Crunchbase, Google Business).

Publish factual, sourced content regularly. AIs favor sources that themselves cite authoritative references.

Clean up outdated sources: contact directories with wrong information and request updates or removal.

Create an llms.txt file with a precise description of your business. Even if its direct citation impact isn’t proven, it standardizes information accessible to bots.

How long to fix a hallucination?

Technical fixes (schema, robots.txt, content) take effect in 4-8 weeks. Reputation fixes (directory cleanup, reviews, press) take 3-6 months. The key point: AIs favor recent sources. According to market studies, 76% of pages cited by ChatGPT had been updated within the last 30 days.