[Mark Dexter]

I think this is a backcourt violation, but there is not enough information to say. If the ball bounced off the recipient in FC, this would be a violation. Here are the four requirements for a BC violation. If any one is missing, there is no violation:

(1) Team A has control.
>>There is team control on the pass, team control for A does not end here because B did not gain control.<<

(2) Ball has frontcourt status.
>>I'm assuming from that the pass that was going into the frontcourt, it either touched the floor in the FC or a player in the FC.<<

(3) An A player must be the last to touch the ball before it goes into the backcourt.
>>It does not matter that it tipped off of B1 and then off of A2, it was still tipped back by A2.<<

(4) A player from A must be the first to touch the ball in the backcourt.
>>A2 apparently did this here.<<

From what I'm assuming, this is a BC. There is no need for player control in the frontcourt, just team control and ball frontcourt status. For example, A1 and A2 are standing in the backcourt near the dividing line. A1 bounce-passes to A2, and the ball bounces in the front-court and then to A2. Backcourt violation in this case.