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Privacy · Luxembourg
Updated September 2026

🔐 A company leaked or misuses my data — who do I report it to?

Direct answer

Under the GDPR you can demand from any company what it holds on you, correction and deletion, and it must answer within a month. Write to the company's data protection officer first. If it ignores you, misuses your data or lost it in a breach, complain to CNPD — Commission nationale pour la protection des données (26 10 60 1) — the data protection authority in Luxembourg; it investigates and fines, free of charge. Identity misuse after a leak: also the police, Police Grand-Ducale (police.public.lu), and your bank.

Call firstCNPD — Commission nationale pour la protection des données
Report toPolice Grand-Ducale
If that failsULC

🗣️ What to say

"Under Article 15 GDPR I request a copy of all personal data you hold on me, its sources and recipients, within one month. Under Article 17 I request deletion of [what]. Please confirm in writing."

🪜 Step by step

  1. Write to the companyAccess request (Art. 15), deletion (Art. 17) or objection (Art. 21). One month to answer; keep the date.
  2. Collect proofThe e-mails, the breach notification, screenshots of the misuse, unsolicited calls or mails that show your data was passed on.
  3. Complain to CNPD — Commission nationale pour la protection des donnéesOnline form. Attach your request and the non-answer. The authority contacts the company and can order and fine.
  4. Identity misuse: Police Grand-DucaleIf someone opened accounts or bought in your name after a leak, report it to the police and tell your bank.
  5. DamagesGDPR gives a right to compensation for material and non-material damage; consumer organisations run collective claims after large breaches.

📇 All contacts

CNPD — Commission nationale pour la protection des donnéesComplaints against companies, investigations, finesWhen the company does not answer within a month, or misuses data📞 26 10 60 1🔗 cnpd.public.lu
Police Grand-DucaleComplaint for identity misuseWhen accounts or orders were made in your name🔗 police.public.lu
ULCAdvice and template lettersFor the request to the company📞 49 60 22 1🔗 www.ulc.lu

❓ Frequently asked

The company says it needs my data for "legitimate interest"

You can object (Art. 21); for direct marketing the objection is absolute — they must stop.

How long does the authority take?

Months, sometimes longer; but a complaint on file is what forces the company to answer, and fines follow patterns of complaints.

I keep getting spam calls

Register on the national do-not-call list where it exists, object to the caller in writing, and report the number to CNPD — Commission nationale pour la protection des données.

📎 Sources

Last checked: 2026-09-26

🔎 Common searches

Recognise your own search? The answer above covers all of these.

  • “report data breach Luxembourg”
  • “data protection authority Luxembourg”
  • “GDPR complaint company”
  • “company won't delete my data”
  • “identity theft after data leak”

🧭 Is this still correct?

We check this information carefully, but phone numbers, websites and rules change — and sometimes we get something wrong. Spotted a mistake or a change? Let us know below.

🔗 Related questions

💳Scammed online→🆔Identity theft→

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