In 2014, unsealed court documents revealed that in 2008, the US government threatened Yahoo with a fine of $250,000 per day if it refused to comply with broad demands for user data under the NSA's PRISM program . Context of "Yahoo.txt" Files

Combinations of email addresses and passwords from various breaches, such as the 2012 "Yahoo! Voices" incident which exposed over 450,000 unencrypted credentials.

In June 2018, Yahoo's UK arm was fined £250,000 by the Information Commissioner's Office (ICO) following a massive 2014 data breach that affected over 500 million users worldwide. The ICO cited "systemic failures" in protecting the personal data of approximately 515,000 UK account holders.