Will a notarized letter be a valid proof for an order of protection case?

My ex-husband barged into my parents' home while my daughter (from a different father) was in my parents' apartment. He had no reason to come inside the apartment. Therefore, my parents were concern about what he did, because my newborn was there. I also felt threaten so I put an order of protection, and I'm going to court for this. I just wanted him to stay away from me and my newborn, but I want him to still be responsible to pick up his two kids ages 7 and 10 from a certain designation. Is this possible?