can sometimes flag profiles that have "impossible" statistics (e.g., more skill points than allowed), though this is separate from the in-game session tag. Steam Community Common Triggers for the Tag
If you are playing with a streamer, you can check their broadcast to see how you appear on their screen. Common Triggers for the Tag Payday 2 How To Know If You Have A Cheater Tag
The tag appears when your client reports data that is mathematically impossible or violates the game's rules. Here are the top offenses: more skill points than allowed)