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Glossary

UWG (German/Austrian Unfair Competition Act)

The UWG ("Gesetz gegen den unlauteren Wettbewerb") regulates fair competition in Germany and Austria. For online retailers, the key provision is § 5 UWG (Germany) / § 1 UWG (Austria): misleading commercial practices are prohibited. Violations typically trigger cease-and-desist letters with €1,500–3,000 amount-in-dispute plus legal fees — and they are statistically far more common in DACH e-commerce than any AI Act enforcement action.

What counts as a "misleading practice"

A misleading practice exists when a product description, advertisement or online listing contains false or ambiguous claims. Specifically problematic:

  • Material claims: "Genuine leather" when it's faux leather, "100% organic cotton" without certification
  • Origin claims: "Made in Germany" when only final assembly happens in DE, components from Asia
  • Certification claims: "ISO 9001 certified", "TÜV tested" without an active proof
  • Performance claims: "boosts metabolism by 30%", "cures arthritis" without scientific evidence
  • Availability claims: "Only 3 left in stock!" when there are actually 50 (scarcity manipulation)
  • Award/test claims: "Stiftung Warentest grade 1.5" when never actually tested or graded differently
  • Price claims: "50% off" when the strike-through price was never genuinely charged

For any of these, objective falsehood OR ambiguous wording is enough to trigger a UWG violation. The seller's internal intent is irrelevant.

Who can send a cease-and-desist

Unlike many other legal areas, almost anyone can pursue UWG violations:

  • Competitors (classic case: competitor sends you to their lawyer)
  • Wettbewerbszentralen (German competition authority — non-profit assoc., funded by cease-and-desist fees)
  • Consumer protection associations (vzbv, AK Konsumentenschutz in AT)
  • Chambers of commerce (limited standing)

The DACH region has a dedicated "Abmahn-Industrie" (cease-and-desist industry): specialised law firms auto-crawl online shops for UWG violations and send mass cease-and-desist letters. Each case typically carries €1,500–3,000 amount-in-dispute plus legal fees. On repeat violations, the contractual penalty (from the cease-and-desist declaration) can reach €5,000–10,000 per incident.

AI-generated copy and UWG

AI hallucinations are an increasing UWG risk factor. Examples from real cease-and-desist cases:

  • AI invents an ISO certification
  • AI claims "BPA-free" without verification
  • AI states the wrong material ("stainless steel 316L" for plain stainless)
  • AI overstates battery life, range, waterproofing

Responsibility always sits with the deployer who publishes the text — not the AI tool. Whether you wrote the text yourself or had an AI generate it is legally irrelevant.

How to avoid UWG violations with AI-generated copy

  1. Verify specs twice — material, dimensions, capacities against the real datasheet, not what the AI says
  2. Cite certifications only with proof — no generic "ISO-certified" phrases
  3. Avoid health/efficacy promises — for cosmetics, supplements, health products, phrase extremely conservatively
  4. Document strike-through prices — MSRP only when actually set by the manufacturer, not invented
  5. Be honest about availability — scarcity manipulation ("only 2 left!") without a real basis = UWG violation
  6. Link sources for tests and awards
  7. Internal review — every AI text human-checked before publication

Relationship to GDPR and the EU AI Act

UWG, GDPR and the AI Act cover different areas:

  • GDPR: personal data
  • AI Act: transparency in AI usage, from August 2026
  • UWG: truthfulness and fairness toward consumers and competitors

A listing can simultaneously be GDPR-compliant, AI-Act-compliant, and still a UWG violation (e.g. if the imagery is honestly labelled but the text contains material lies).

Common mistakes

  • "Just make it sound good" as an AI prompt — AI fills marketing phrases with fabricated specs
  • Using competitors' copy as a template — the UWG trap gets inherited
  • Multiple languages without re-check — a clean German description can become a UWG trap in English translation
  • Test/award phrases from boilerplate templates — "multiply awarded" without proof is actionable

Related terms

  • E-E-A-T — trust signals that reduce UWG exposure
  • C2PA — relevant for AI image labelling
  • Conversion Rate — misleading claims raise it short-term, ruin it long-term