Ok I manage to find a game when we are playing at the same time in diffrent teams: https://battlelog.battlefield.com/bf4/battlereport/show/1/1293867814920174528/328706824/

I can also see in the Battlelog he added me as a friend in about two weeks ago. 

Thanks for your reply! I don't have anything saved but yes we have played at the same time and also killed eachother. Is'n that possible to find in some stats some where? 

Soldier Name: Dev1stator

Link To BF4DB Soldier Profile: https://bf4db.com/player/ban/328706824

Have You Claimed Your Soldier: YES

Appeal: I'm 47 years old in a month and been playing BF4 since 2014. I have NEVER ever cheated in any way!!  For a fact I know that my 12 year old son downloaded the BF4 game maybe about a month back. He bought the game with his own money just to be able to play with me.

It cannot be illegeal to have two diffrent games/accounts on the same network? We also have diffrent Origin accounts. If proof needed please tell me what to do. I tried to attach info about my EA account but you only allow external URL's (it´s on my HDD)