Amazon has been hit with an $886.6 million European Union fine.
It's for processing personal data in violation of the EU's General Data Protection Regulation, known as GDPR.
The the e-commerce giant revealed the news in a regulatory filing on Friday (July 30).
The fine was imposed on Amazon Europe Core this month by the Luxembourg National Commission for Data Protection.
Amazon said in the filing that it believes the decision to be "without merit".
And intends to defend itself vigorously.
GDPR requires companies to seek people's consent before using their personal data.
The penalties for breaching it can be steep.
News of a potential fine for Amazon was first reported by the Wall Street Journal in June.