Any tipper, aside from ones DIRECTLY involved with the child/ mandated reporter may call anonymously.
They ask you that when you call in.
When you call you have to have as much information as possible.
1. Age of the child.
2. Full legal name of the parents.
3. What they said.
4. Did you see the child yourself?
5. When did they say it- sit down and take notes to recall details- you do not want to uh um when you are on the phone with them.
6. Evidence? Maybe there is way you can oversee it in the school they go to? Possibly ask to sit for the kid to see what their reaction might be?
Lastly- good luck and I hope you are not trolling as shit like that muddies the waters.
DO NOT call unless you have repeated evidence that you can see, touch, smell, taste or hear. You conjectures are not evidence.