I got a letter from Human services and Public Health Dept. for Kinship?

So I got a letter from them for kinship, I gladly accepted because he needs to be in a home with family members and people that aren t related to him.

I have to go to my local Children services and do paperwork and get my background check and all that done. He is 4 and half hours away from us but he never grew up here or around us but remembers us when we go visit (when he was with his mother). I do want him in my care now that and everyone told me to do it so he can grow up around family members if his mother don t cooperate with them and don t do what they ask.

I also have a question how they knew my address no one in our family knows our physical address just the ones who live here. Everyone just knows my P.O Box but on the letter only had street address that s it. Can they access these things or someone had to tell them? Lol