We cannot add people in a WhatsApp group without their permission. This has been made clear by the Spanish Agency for Data Protection (AEPD), according to this resolution issued against a Town Hall that wanted to use this medium to send informative circulars to its neighbors.
It happened last month in a small municipality called Boecillo, located in the province of Valladolid (Spain), although the events took place throughout last year. The mayor of the town decided to create one of these groups in the well-known application of WhatsApp in order to send circulars to citizens. In this way, the information would arrive immediately and comfortably to all of them, which a priori seemed like a great idea. The total number of components in the group was 256 contacts, the maximum amount accepted by this platform in the creation of groups.