Why does the electricity company want my ID?
To prove who's signing the supply contract. It's legitimate, but they don't need a clean copy: your name and DNI (Spanish national ID) number are enough. Cover the rest and mark the copy with the company's name and the date.
Why they ask for it
Electricity, water, gas, internet, alarms: every sign-up or change of account holder means sending a copy of your ID, often through a sales rep or a call-center agent rather than the company itself.
That copy travels through channels you don't control — a rep's personal phone, a subcontractor's CRM — and stays there indefinitely.
The real risk
With a clean copy of your ID, someone can set up fraudulent contracts and switches in your name — the classic "slamming" — or sign up for services whose unpaid bills land on you.
How to send it with Ofuska
- 1
Store
Your DNI encrypted, always at hand for the next sign-up.
- 2
Redact
Quick zones: signature, support number and MRZ gone. In black and white so the copy can't pass for an original.
- 3
Trace
A "Company X — electricity sign-up — date" mosaic. If months later your ID shows up on a contract you never made, your history tells you which rep received that copy.
What to show and what to hide in a sign-up
For a sign-up or a change of account holder, two pieces of data are usually enough: who you are and your document number. Everything else is unnecessary.
Show
- Full name
- Document number
Hide
- Photo
- Signature
- CAN
- Expiry date
- Date of birth
- Address
- Full MRZ
Recommended mosaic: "Company Z sign-up · date".
Glossary: MRZ, CAN, CIP and other terms →Frequently asked questions
- Can the sales rep refuse a redacted copy?
- The company needs to identify the account holder: name and DNI number. If the copy shows them, the sign-up goes through as usual. A marked copy also protects the rep from suspicion if anything leaks.
- A service I never signed up for has appeared in my name. What do I do?
- Complain to the company and file a police report. If you sent your copies with Ofuska, your history shows who you gave your ID to, so you can include that in the report.