Our club requires coach approval, and DD has actually been told no before, due to bad blood among coaches. Our club also expressly prohibits guest play when chasing berths or standings that directly compete with us. Maybe there's a rule about pickups and what teams they can play on at higher levels? I'm really not sure and I know that smarter people than I will chime in on that.As a head coach do you require your players to notify you when they guest play for another team? Do you even care as long as it doesn't interfere with any of your team activities? Does anybody require head coach approval before picking up?