The Federal Communications Commission (FCC) announced its largest ever fine for illegal robocalls. The $300 million fine is being levied against Roy M. Cox and Aaron Michael Jones for running a robocall scam purporting to sell auto warranties under the auspices of numerous companies.

The alleged violations that the FCC details are extensive:

“The enterprise violated a multitude of robocall prohibitions by making pre-recorded voice calls to mobile phones without prior express consent, placing telemarketing calls without written consent, dialing numbers included on the National Do Not Call Registry, failing to identify the caller at the start of the message, and failing to provide a call-back number that allowed consumers to opt out of future calls. The calls also violated spoofing laws by using misleading caller ID to disguise the enterprise’s role and prompt consumers to answer.”

Punishing and preventing these sorts of auto warranty robocall scams have been an increasing priority for government regulators. Last February, the Federal Trade Commission (FTC) filed charges against another entity accused of similar violations. Last summer, the FCC and Ohio Attorney General Ned Yost went after Cox and Jones, with the FCC authorizing phone service providers to cut off traffic to their companies and Yost filing suit against them.