id
identify themselves to PersonY join the crew legally buy alcohol legally drink legally have alcohol make a fake mimic personY offer to the operator pass a background check pass background check produce for law enforcement prove PersonX's age prove PersonX's drinking age prove PersonY's drinking age prove drinking age prove that they can legally drink prove the check is theirs prove their identity in case of adopting prove their identity to the bailiff prove their identity when entering prove their identity while traveling prove their ownership of the credit card prove their person prove they are 18 prove they are of age prove they are old enough prove they own the credit card prove they're of age prove who it is prove who the are prove who they are