---
title: "NZ Greenwashing-Check: check green claims in JTL-Shop"
url: https://nucez.com/en/projects/nz-greenwashing-check
lang: en
description: "JTL-Shop 5 plugin that finds risky environmental claims under the new German UWG: 12 rules, each finding with legal basis, reason and tip. Read-only, no AI."
alternate_de: https://nucez.com/projects/nz-greenwashing-check
---

Own product for JTL-Shop 5

# NZ Greenwashing-Check

## The problem it solves

Since **27 September 2026**, the German UWG bans generic environmental claims such as "eco-friendly", "sustainable" or "climate neutral" unless you can prove them. There is **no transition period**.

Many shops take over thousands of texts from the Wawi and from manufacturers. You are **liable for manufacturer texts too**, but you do not know where risky wording sits. Nobody can read every text by hand.

Everything at a glance 1 / 5

### Overview with score

The overview shows the **greenwashing score**, **open findings per level** (high, medium, note), the last scan and the **most frequent rules** in your shop.

The scan runs **every night via the JTL cron** and at the push of a button, large catalogs in stages. No impact on shop loading times.

## Find risky green claims before someone sends you a cease-and-desist letter.

A plugin of my own for **JTL-Shop 5** that checks all shop texts against the **12 rules of the new German UWG**: products, characteristics, categories, manufacturers, CMS pages, OnPage Composer content and news, in **German and English**.

Every finding comes with **level, legal basis, reason and a tip** on what to write instead. The plugin is **read-only**, works **without AI** and without external services. Setup is described in the [documentation (German)](/docs/nz-greenwashing-check).

- **Type:** Own plugin for JTL-Shop 5
- **Compatibility:** JTL-Shop 5.5 to 5.8, PHP 8.2 to 8.4
- **Checks:** Texts in German and English
- **Trial:** 14 days free in the JTL Extension Store
- **Documentation:** [Installation and rules (German)](/docs/nz-greenwashing-check)

## Tested with a real shop

Before launch, the check ran on the catalog of a real shop with around **12,850 texts**. Among other things it found generic claims such as "ökologisch unbedenklich" and "environmentally friendly", which came from manufacturer texts in many products. False alarms from the test were fixed in the rules. The check is **a tool, not legal advice**.

- < 2 s full scan of around 12,850 texts
- 12 rules under the new UWG
- 0 changes to your texts

Technology used

- PHP
- JTL
- MySQL

---

Nucez Software, Bjarne Fomferra, Enger (Germany). Contact: info@nucez.de, https://nucez.com/en/anfrage