WhatsApp has been fined €225 million for breaking the EU’s data privacy law by not telling its users how it was sharing their data with its parent company Facebook.

In one of the biggest fines relating to the General Data Protection Regulation (GDPR), the Irish data regulator applied a penalty more than four times the level it had initially proposed for the messaging service after coming under pressure from other European countries.

The WhatsApp ruling came after Luxembourg fined Amazon a record €746 million in July for breaching GDPR and Ireland fined Twitter €450 million in December for not informing regulators about a data leak within 72 hours.