Complaint about a contract you never asked for or a switch without consent (Spain)
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For a person in Spain whom an electricity, gas, phone or other company has signed up, switched from their supplier or charged for a service they did not ask for. The letter denies any consent, recalls that silence is not acceptance and that unsolicited supplies need not be paid for (art. 66 quáter of the Spanish Consumer Protection Act, TRLGDCU), asks for the contract to be cancelled, a return to the previous company and a refund, and invites the company to negotiate as Spanish Organic Law 1/2025 requires. Send it by burofax with certified content. In Spanish.
- Made for use in Spain
- Last updated October 20, 2026
Published byDocMuse
When to use this document
- Your electricity company in Spain was changed without your consent.
- After a sales call you are being charged for a service you never ordered.
- Your mobile operator put you on a lock-in promotion without asking.
- You want a contract you never asked for cancelled in writing and your money returned.
What you fill in
The details the document asks for.
- Customer
- Customer's address
- Sender's DNI or NIE (Spanish identity number)
- Trader
- Company's postal address (from the contract, invoice or legal notice on its website)
- City
- Date
- Contract number
- The service or contract you did not ask for, and how you found out
- Discovered on
- Previous company (if you were switched)
- Claimed amount
Common questions
- Do I have to pay in Spain for a service I was signed up to without asking?
- No. The law bans supplying unsolicited goods or services, including electricity, gas or water, with a demand for payment, and the consumer need not pay for or return them; silence is not consent (art. 66 quáter of the Spanish TRLGDCU). Where a utility supplier was switched without consent, you are taken to want to stay with the previous one. If the company claims you consented, it must prove it, for example with the full recording of the call. Keep the bills and do not pay what you dispute; if you have already paid, claim a refund with this letter.
- How do I send this complaint in Spain, and who else can I tell?
- By burofax with certified content to the company that signed you up or is charging you: it proves the text and the date and makes the attempt to negotiate that Spanish Organic Law 1/2025 requires before suing, with thirty calendar days to reply. Also tell your previous company, so that it is on record that you did not ask for the switch. For electricity and gas, the CNMC, Spain's energy regulator, sanctions switches without consent; for phone services, you can then go to the Telecoms User Office. If someone used your details without permission, you can report it to the police.
- Are there free models in Spain for complaining about an unrequested sign-up, and what if they do not reply?
- Yes: the Spanish associations OCU and FACUA publish free model letters for unrequested contracts and supplier switches, and the European Consumer Centre in Spain offers a template on unsolicited goods. If the company does not reply within thirty days or does not cancel the contract, you can complain to the consumer office (OMIC) or your region's consumer service, ask for consumer arbitration if the company accepts it and, for phone services, go to the Telecoms User Office.
How you can sign this document
- Print it and sign by hand. The signature lines in the document are left blank on purpose — sign on them in ink.
- Sign it yourself with a qualified electronic signature. If you already hold a QES — Evrotrust, B-Trust, StampIT, ZealiD or any qualified provider on the EU Trusted List, on a card, a USB token, in a mobile app or in the cloud — our signing guide explains step by step how to sign this exact file without invalidating it. Step-by-step help, and a way to check it worked
DocMuse sells documents, not legal advice. Acceptance always depends on the recipient's rules and your local law.
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