A mass claim is being prepared against Amazon for allegedly illegally tracking millions of Dutch people, reports Trouw.

Stichting Data Bescherming Nederland announced that it intends to bring a court case claiming that Amazon has collected more data than it needs in breach of data protection law.

“It is even the case, in many situations, that Amazon follows your behaviour on the internet after you have refused permission,” it claims.

Trouw reported suspicions that the web giant may still follow customer behaviour on other sites such as the property website Funda, when looking for a holiday or family days out and other websites where it advertises, thanks to tracking cookies.

The foundation behind the claim says Amazon differs from Facebook or Twitter, which offer free services in exchange for customer data, while Amazon is simply a web shop with clients. It has written to Luxembourg-based Amazon and if it does not get a response, it will launch a court case in the name of an estimated five million Dutch users.

A spokesperson for Amazon told Trouw it does not believe it breaks the law. “We are currently reviewing the contents of the letter and will respond in due course,” the spokesperson reportedly said.

A Dutch court ruled in March that Facebook did break privacy rules in the way it handled personal data.