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Safety · Czechia
Updated September 2026

☎️ I keep getting unwanted sales calls — how do I stop them, and who enforces it?

Direct answer

Cold calls to consumers are banned or opt-in in most EU countries, and the rest have a do-not-call register: register your number once, and every call after that is a fine for the caller. Tell each caller "remove me, I object" — that objection is absolute under GDPR. Report persistent callers with the number and time to Český telekomunikační úřad (ČTÚ) — námitky (224 004 111), which enforces the telemarketing rules, and to Úřad pro ochranu osobních údajů (ÚOOÚ) (234 665 111) for the data-protection side. Česká obchodní inspekce (ČOI) (222 703 404) collects patterns and scam numbers.

Call firstČeský telekomunikační úřad (ČTÚ) — námitky
Report toÚřad pro ochranu osobních údajů (ÚOOÚ)
If that failsČeská obchodní inspekce (ČOI)

🗣️ What to say

"I am registered on the do-not-call list / I object to any marketing calls. Remove my number and my data from your records now and confirm in writing. Which company are you, and where did you get my number?"

🪜 Step by step

  1. Register your numberOn the national do-not-call register; it is free and takes a minute.
  2. Ask, record, hang upCompany name, where they got your number, then "remove me". Note date, time and the calling number.
  3. Objection in writingTo the company, if you know it — GDPR Article 21; marketing must stop immediately.
  4. Report to Český telekomunikační úřad (ČTÚ) — námitky and Úřad pro ochranu osobních údajů (ÚOOÚ)Numbers, dates, what they sold. Fines follow patterns of reports.
  5. Block on the phoneBlock the number, enable the carrier's spam filter; report scam calls (fake bank, fake police) to the police as well.

📇 All contacts

Český telekomunikační úřad (ČTÚ) — námitkyDispute decisions against operatorsAfter complaining to the operator without a solution📞 224 004 111🔗 www.ctu.cz
Úřad pro ochranu osobních údajů (ÚOOÚ)Complaints against companies, inspections, finesWhen the company does not answer within a month or misuses data📞 234 665 111🔗 uoou.gov.cz
Česká obchodní inspekce (ČOI)Advice, inspections, fines for tradersWhen the shop refuses📞 222 703 404🔗 www.coi.cz/pro-spotrebitele
Bílý kruh bezpečí — 116 006 / Probační a mediační službaFree victim support, state compensationAfter any crime📞 116 006🔗 www.bkb.cz

❓ Frequently asked

They said I "agreed" on a comparison site

Consent to marketing must be specific and separate; buried consent is invalid. Withdraw it in writing and report.

The number changes every time

Spoofing. Report anyway with the times; the regulator traces the carrier behind the calls.

A "contract" was concluded by phone

For consumers, most countries require written confirmation for phone sales; a contract you never confirmed does not exist. Dispute it in writing.

📎 Sources

Last checked: 2026-09-26

🔎 Common searches

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

  • “stop unwanted sales calls Czechia”
  • “do not call register Czechia”
  • “report telemarketing calls”
  • “cold calling illegal Czechia”
  • “spam calls complaint regulator”

🧭 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

🔐Data misuse→🎯Phishing message→🆔Identity theft→💻Online harassment→

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