Blocking of personal Data in Switzerland
When it makes sense and what you need to know
Did you know that your Swiss address can be disclosed to third parties upon request, without your consent? Many people mistakenly assume that their data is automatically protected. In fact, the opposite is true: if you want to protect your privacy, you have to take action.
All information at a glance:
In this article, we explain what a data block is, how to apply for one, and when it is worth taking a closer look.
What is a data block?
A data block is a tool that allows you to restrict the disclosure of your personal data, such as your name, address, and date of birth, to third parties.
It prevents your data from being passed on to private individuals, political parties, advertisers or debt collection agencies, for example, unless there is a legal requirement to do so.
The block does not apply automatically. You must actively apply for it at the residents’ registration office in your municipality of residence.
Who can request a data block?
In principle, any adult who is a resident of Switzerland. The request can be made informally, either in writing or verbally, and is usually free of charge.
Advantages of a data block
- Protection against unwanted contact
- No disclosure to third parties, associations or address brokers
- Important in cases of threats, stalking or sensitive family situations
- Increased control over your own data
- Simple and free application
What you should bear in mind
A data block primarily protects you from private individuals. However, authorities (e.g. the tax office, the police, health insurance funds and social security agencies) may still use your data if necessary for them to carry out their duties.
IMPORTANT: There are cantonal differences in Switzerland! Certain laws concerning the disclosure of personal data are embedded at cantonal level and are therefore not uniform!
In addition, the following applies:
- The restriction does not automatically prevent all disclosure of information – if someone has a proven legal interest (e.g. in the case of outstanding claims), the restriction can be lifted.
- If you move to another municipality, you must reapply for the restriction.
Which authorities must be informed separately?
Blocking your data with the residents’ registration office is not sufficient to protect your data comprehensively. Depending on the situation, the following authorities should be contacted separately:
Public Authority |
Why? |
| Municipal/Cantonal Tax Office |
Prevents data from being passed on to third parties (e.g. debt collection agencies or aquaintances).
|
| Road Traffic Office | Prevents vehicle data from being accessed publicly. |
| Dept Collection Office | Restriction of information is possible (e.g. in cases of harassment). |
| Post Office | Deactivate address disclosure and mail forwarding. |
| Telecommunications providers (Swisscom, Sunrise etc.) |
Suppress entry in the online telephone directory. |
In which cases does it make sense to block your data?
Consider blocking your data, especially if you…
- want more control over your privacy
- want to avoid unwanted advertising or political contact
- are in a sensitive life situation (e.g. separation, stalking, moving away)
- are in the public eye or exposed
When can you do without it?
In some cases, data blocking is unnecessary or even counterproductive:
- If, for example, you want to be easy to find (network, school friends, clubs)
- If you are in frequent contact with public or non-profit organisations
- If you already appear publicly in other registers (e.g. social media, commercial register, imprint)
Conclusion
Data blocking is an effective and underestimated means of protecting your own data. Especially in an increasingly networked world, it can help you retain control over your own personal information. It is easy to apply for – but should be used consciously.
Hanna Treuhand recommends: regularly checking where your data is stored – and taking early action if you want to retain control over it.
Do you have questions about data protection or information blocking, or would you like to know how to protect your data strategically?
Contact us – discreetly, competently and entirely in your best interests.
