The program’s existence came out after the news outlet obtained a copy of a March USPS bulletin that was “distributed through the Department of Homeland Security’s fusion centers.” It warned of the possibility of violence at upcoming protests though they acknowledged they had no reliable intelligence to suggest any alleged threats were legitimate:

“Analysts with the United States Postal Inspection Service (USPIS) Internet Covert Operations Program (iCOP) monitored significant activity regarding planned protests occurring internationally and domestically on March 20, 2021,” says the March 16 government bulletin, marked as “law enforcement sensitive” and distributed through the Department of Homeland Security’s fusion centers. “Locations and times have been identified for these protests, which are being distributed online across multiple social media platforms, to include right-wing leaning Parler and Telegram accounts.”

[…]

“No intelligence is available to suggest the legitimacy of these threats,” it adds.

The bulletin includes screenshots of posts about the protests from Facebook, Parler, Telegram and other social media sites. Individuals mentioned by name include one alleged Proud Boy and several others whose identifying details were included but whose posts did not appear to contain anything threatening.

“iCOP analysts are currently monitoring these social media channels for any potential threats stemming from the scheduled protests and will disseminate intelligence updates as needed,” the bulletin says.

The report about the previously unknown iCOP sparked an outcry among Congressional Republicans. A House Oversight and Reform Committee hearing was held a week later where a USPS official confirmed its existence without going into a lot of detail: