Answer:
inside address
Step-by-step explanation:
A business letter is a document, that is formal, and it is used to communicate from one company to another, could be to ask for something, or to inform something, the person´s name has to be added in the closing signature because is the sender, or who is sending the letter and has to sing to say he is the one sending it, and in the greeting so the reader knows who is talking to him, only in the inside adress it doesn´t have to be added.