Tenants Report Algorithmic Bias in Germany

Discrimination & Equal Treatment 3 min read · published September 07, 2025

As a tenant in Germany, algorithmic bias in rental decisions, applications or automatic credit checks can affect your housing situation. This practical guide explains in plain language which documents to collect, which deadlines apply and how to prepare a formal report. I name official authorities and forms, show step-by-step how to secure evidence and which authorities or courts to contact. The aim is to give you clear actions so you can protect your rights and have discriminatory automation reviewed. Legal terms are explained, and there are tips for meeting deadlines and presenting a complaint with solid evidence.

What is algorithmic bias and why does it affect tenants?

Algorithmic bias means an automated system systematically disadvantages people due to data or programming. For tenants this can mean automated rejection of rental applications, higher required deposits, or faulty credit evaluations. If you suspect you are affected, document every decision, automated message or rejection immediately.

Automated decisions must be explainable and verifiable.

Immediate steps for affected tenants

  • Collect all relevant documents: emails, automated rejections, screenshots of messages and date/time stamps.
  • Request written information about the decision and ask for an explanation of how the system made the decision.
  • Observe deadlines: respond promptly to requests or objections, otherwise you risk losing rights.
Record exactly who communicated with you and when, and store copies securely.

Important documents & official forms

For a formal report or complaint you need organised documentation. Typical forms are not uniform nationwide; many authorities provide online forms. Recommended are:

  • Evidence folder: copies of emails, screenshots, reports, contract extracts and payment receipts.
  • Complaint letter to the provider or landlord: date, specific incidents, desired remedy (e.g. review, compensation).
  • Complaint form for the competent data protection authority (state authority or the Federal Commissioner for Data Protection), if personal data or automated profiling are affected.
A clear chronology increases the clarity of your complaint for authorities and courts.

Which authority or court is responsible?

For breaches of data protection rights, the respective state data protection authority or the Federal Commissioner for Data Protection is responsible. For tenancy-related consequences (e.g. unlawful termination, discrimination in offers) civil claims should be examined at the local Amtsgericht; for fundamental legal issues, appeals may reach the Landgericht or the Federal Court of Justice (BGH).

File data protection complaints in addition to civil review if personal data are affected.

Practical procedure: form, deadlines, evidence

  • Check deadlines: some civil claims expire and authorities expect prompt complaints.
  • Complete the form: use the complaint form of the state data protection authority or the Federal Commissioner for Data Protection online form.
  • Attach evidence: include chronologically sorted copies with short explanations for each document.
  • Contact details: name a contact person and telephone number for follow-up questions.
Send important letters by registered mail or document electronic submission.

Examples: when which form helps

If an automatic scoring led to rejection, request a data overview (Art. 15 GDPR) and an explanation of automated decision-making (Art. 22 GDPR). For tenancy matters consider a warning letter or lawsuit at the Amtsgericht to enforce injunctions or damages; legal bases are found in the BGB.

Always request a written justification after a rejection.

FAQ

How long do I have to challenge an automated decision?
That depends on the specific claim; civil limitation periods follow the BGB. However, react quickly and submit evidence without delay.
Can I force the landlord to disclose the system?
You can request information about the personal data processed about you and request review of automated decisions. In some cases a court can order disclosure.
Where do I report discrimination by algorithms?
Report data protection violations to the competent state data protection authority or the Federal Commissioner for Data Protection; tenancy-related consequences can also be pursued at the local Amtsgericht.

How-To

  1. Collect all relevant documents and create a chronological overview of incidents.
  2. Request written disclosure from the provider or landlord about the automated processes used.
  3. File a complaint with the state data protection authority and attach evidence.
  4. Observe deadlines and simultaneously review civil action at the Amtsgericht if you suffered disadvantages.
  5. Seek legal advice if necessary and use local counselling services to prepare filings.
  6. Document the process and keep all files for potential court proceedings.

Key takeaways

  • Algorithmic bias can directly affect tenancy rights and must be documented.
  • Early evidence collection and formal complaints improve chances of success.
  • Data protection authorities and local courts are the proper channels in Germany.

Help & Support


  1. [1] BGB §§ 535–580a — Gesetze im Internet
  2. [2] Federal Commissioner for Data Protection and Freedom of Information
  3. [3] Federal Court of Justice
Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights Germany

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for tenants everywhere.