So there is a stray dog that looks super unhealthy and skinny that hangs out by my house but i dont claim it ill just pet it sometimes…?

I’m afraid people might think it is my dog and call animal services and someone might try to say its my dog and get me fined for animal cruelty or something. I don’t have the responsibility for the dog… Its not mine. And if i feed it people will think its mine.. I don’t wanna call animal services myself i’m afraid they will just put him down.. What do i do?