Illegal formations

[dv8r]

Are they actually illegal to use? I mean can someone get in trouble for using them?

This guy beat me 3-0 having much more possession than me during the game and he was absent. Today i supported his opposing team to even things out, with my support he won that game with a possession of Home team 20% his team 80%.

You are misinterpreting what we mean by an illegal formation. No, you won't get in trouble and no, you won't get arrested by the Nordeus police. An illegal formation is a formation that will lose you a lot of possession.. As Confuzzled said, you will get a maximum of 20% if you use an illegal formation.