With 12-man rosters, 2 positions will be 3-deep. In the situation where a player at a given position has two players at the same position with better ratings than him, the recruit will nearly always accept the RS without being informed. But not always. And my observation excludes multi-starred players with sights set on the NBA.
The two players above the recruit on the depth chart need to be listed at the same position as the recruit for the almost-automatic acceptance to be assured.
I have had success sending several HV's with a notice of RS. They typically scream, stop considering, then come back when the added recruiting efforts (I add a couple more HV's the next cycle too) take effect. But it can be risky when your recruit is likely being wooed by other teams. For that reason, I try my luck with not-informing and, if they freak out, remove the RS.