asking for help from ump behind mound on check swing

[DG]

For once, I agree with everyone. I always tell my partner in pre-game that I might come to you in B or C on a check swing. If you can't tell give the safe sign and say nothing. If he did I want that strike I missed back.

I was in C a couple weeks ago in a summer league of college players using wood bats. On a check swing situation the pitcher turned around and asked could they appeal to me, I said no, only my partner could. He didn't.
A couple innings later, when that team was at bat, the same thing happened, but this time the defense appealed to my partner, who appealed to me, and I said "yes he did", while raising my fist. They went nuts, claimed I had told them they could not appeal to me. I simply had to explain to the coach who came out that they failed to hear the rest of my earlier comment, ie "only my partner could". It was definitely a pitch on which I could tell he swung, and my partner was blocked out by a catcher standing up. It was only the 2nd strike so I don't know what the fuss was about. Bur order was restored and we went on.