I actually like both Joe's AND Dad of a 17's approaches. Either one could work. I work with HS age students and one of my roles is supervising student elections. Most kids running for office get "cut". Our method of notifying them used to be personal phone calls that were hit and miss (kids were at practice for some activity they were involved in, or they saw a strange # on their phone, or they just didn't feel like getting the news, no matter what it was, from a live human being). One year I thought to ask the candidates how they wanted to be notified, and almost to a person, they said "Text us!" I said no, I'm not going to send out text messages from my personal phone to 30 candidates. "Ok, then email us! That'd be great! If we lose, we find out when we want to find out. No one has to be around." Fair enough.
When I coached, back in the days of the telegraph, I met with each kid and explained what the situation was. I had been cut off my 8th grade team with a sheet of paper on tacked to a wall in the main hallway of the school. I decided I had to work harder and I had parents who helped me turn the cut into a positive. I told myself that if I ever coached, I would NEVER cut kids by posting a list on a wall somewhere.
I may have already shared on the site what follows, so sorry if this is a repeat. Even a list on the wall would be better than what happened to my 2017's classmates in 7th grade (Almost all of whom had been classmates since kindergarten, and all of whom had played neighborhood ball with and against each other since they were 5 yrs. old).
Our school has limited field space so tryouts took place at a public ball field about 25 minutes away from campus. Kids were bussed from the school to the public field. We always have a huge turnout for baseball, about 50 7th graders or so, for roughly 18 spots. As far as I know the # of players kept on the team only had to do with which kids the coach thought could produce. In any case, the day for cuts came and the coaches read out a list of names to the whole group after practice, told those kids to stay behind, and sent everyone else to the waiting bus. They then proceeded to tell the group left behind that they were all cut (30 or so kids). Tough news to hear but even tougher to deal with when that group had to walk the 1/4 mile or so to the bus, and then walk down the gauntlet of the bus aisle past EVERY kid who had made the team. Then they had to endure the ride back to school in a bus where a third of the kids were excited about making the team, and 2/3 of the kids were dealing with the bad news. THEN, they get to school and many of them showered together. My son said by the time the bus got back to school, many of the cut kids had cried so much they were cried out.