Depends what you mean here.
Most of the time we used rider swap at WDW, the CM needed to visually verify that our group included multiple people over the required height, and at least one child below the required height. It was not enough to simply tell the CM that we had a child, nor was it simply enough for the waiting adult+infant to ask for a rider swap. If you were able to simply SAY you had a child, then you got lucky.
Now we always had a group of 7people or more, so not all 7 of us had to be present, but at least 2folks tall enough+1 too young/short had to be present, and even that wasn't enough for many CM's. We'd be told solo riders don't need a child swap pass until we presented enough people.
It got frustrating especially in the Splash/BTMRR area. As soon as someone tried to find a place to sit or park a stroller around there, we'd lose them in the crowd, and the BTMRR CM's were often the most insistent. Even after we presented everyone, a few CM's STILL gave us a suspicious look. Go figure!