Is it legal to use an AI voice agent to answer calls in Spain?
Yes. In Spain it is legal for an AI voice agent to answer your business calls. The relevant conditions are common sense: tell callers they are speaking with an AI (transparency under the EU AI Act, applicable from 2 August 2026) and handle personal data in line with the GDPR. The Customer Service Law does not require small businesses —such as dental clinics, garages or vet practices— to provide human-only support.
1. Transparency: disclose it is an AI
The EU AI Act requires that, when a person interacts with an AI system, they are informed of it unless it is obvious. For a voice agent this is solved with a single sentence at the start of the call. Its transparency obligations apply from 2 August 2026.
Collmmi's agents introduce themselves as AI assistants at the start. There is no deception: the caller knows what they are talking to, and the experience is still natural.
2. Data protection (GDPR)
A call may contain personal data (name, phone number, reason for calling). The same rules you already follow with your phone or calendar apply: inform about the processing, handle only what is necessary, store it securely and for a limited time.
The agent provider acts as a data processor: it handles data following your instructions and with GDPR safeguards. Nothing you were not already doing with any tool that touches customer data.
3. The Customer Service Law does not apply to small businesses
There is a lot of talk about the new Customer Service Law and its waiting-time limits or human-support option. The key point for a small business: that rule targets large companies and regulated sectors (energy, telecoms, banking, utilities), not a dental clinic, a garage or a vet practice.
In other words: using an AI voice agent is not only legal, it goes in the direction the market demands —fast answers, no queues. And when a person is needed, the agent hands the call over.
4. There is always a person behind it
The agent does not replace human judgment where it matters. It is trained to recognize when it cannot help and hand over to your team, take a message or schedule a callback. It does not give clinical, mechanical or veterinary advice: your business handles that.
Frequently asked questions
Do I have to disclose it is an AI?
Yes, and the agent does it for you: it introduces itself as an AI assistant at the start of the call.
Can the AI make medical or legal decisions?
No. It does not give clinical or legal advice; it hands over to a person on your team when the query requires it.
Where are call recordings and data stored?
Wherever you agree during setup (your CRM, a sheet, your calendar), always in line with the GDPR.
Keep reading
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Informational guide by Collmmi. It does not replace professional advice.