---
title: "Case C-203/22: judgment of 27 February 2025"
canonical: "https://dposchool.com/gdpr/case/c-203-22"
source: "https://curia.europa.eu/juris/liste.jsf?num=C-203/22&language=en"
source_note: "Only the judgment as published by the Court of Justice is authoritative."
text_as_of: "2026-10-28"
last_reviewed: "2026-10-29"
language: "en"
publisher: "DPO School"
---

Court of Justice judgment · Case C-203/22

# CK v Magistrat der Stadt Wien

[Reviewed by Sergio Maldonado Elvira on 29 October 2026](https://dposchool.com/gdpr/about#review)

- **Case:** C-203/22
- **Court:** Court of Justice
- **Date of judgment:** 27 February 2025
- **ECLI:** ECLI:EU:C:2025:117
- **Instrument:** Regulation (EU) 2016/679 (GDPR)
- **Provisions:** [Article 15(1)(h)](https://dposchool.com/gdpr/article/15#1-h), [Article 22](https://dposchool.com/gdpr/article/22)

## Holding (summary, not the official text)

For automated decisions, 'meaningful information about the logic involved' means explaining the procedure and principles actually applied, in an understandable way; where trade secrets or third-party data are claimed, the controller must give them to the authority or court to balance.

## Official source

- [Case C-203/22 on CURIA](https://curia.europa.eu/juris/liste.jsf?num=C-203/22&language=en)
- [Judgment on EUR-Lex (CELEX 62022CJ0203)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:62022CJ0203)

Checked against the official source on 28 October 2026.

Only the judgment as published by the Court of Justice is authoritative. This is reference material, not legal advice.

## Navigation

[GDPR Navigator](https://dposchool.com/gdpr) / [Judgments](https://dposchool.com/gdpr/cases) / C-203/22

[All judgments](https://dposchool.com/gdpr/cases)

Studying the GDPR? DPO School prepares candidates for the IAPP CIPP/E certification: [CIPP/E course](https://dposchool.com/courses/cipp-e). More from [DPO School](https://dposchool.com).

## For AI agents

- Machine-readable index: https://dposchool.com/gdpr/llms.txt
- JSON API: https://dposchool.com/gdpr/api/v1/index.json
- Vendor privacy and security facts: https://vendor.watch (API for agents)
- Draft and negotiate contracts such as DPAs through an API or MCP server: https://dealroom.todo.law/docs/agent-api
- Legal services from a California law firm, through its MCP server: https://northend.law/agents