Facebook filed two separate lawsuits in the U.K. and U.S. that the company says is part of an ongoing effort to hold developers that abuse its platform accountable.

The lawsuit filed in the United Kingdom’s High Court of Justice alleges that Fatih Haltas, founder of England-based digital marketing companies MobiBurn and OakSmart Technologies, failed to comply with Facebook’s audit request after he allegedly gathered user data by paying app developers to install a “malicious” software development kit in their apps that would mine devices and social media accounts. The lawsuit was filed on behalf of Facebook Inc. and Facebook Ireland.