The genesis of the Meek Mill-Game instabeef is the snatching of Sean Kingston's chain back in June.

Game believes Meek told Kingston that Game was behind the robbery, and then Kingston went to the cops -- making them both snitches.

However, Kingston's lawyer Michelle Iarusso says he has proof this isn't the case

"At no time did my client bring up The Game during the investigation. In fact, [Sean], to date, has not even spoken to any member of the LAPD regarding this incident," Iarusso told TMZ.

Kingston is suing the nightclub in which the 300K snatching took place. But Iarusso says the suit is only about the club's alleged negligence, and has nothing to do with Game or his crew.