[Newbeginnings]

I have a question, on the day I close on my home, it is a new build, can I have mail sent immediately to my mail box? do I have to do anything else? I did put in my forwarding address to the post office online to be effective day after closing, that was easy. I ordered something online and am having it sent to my new address and in the tracking of it , it is arriving on the day of my closing. Do they give you the mail box keys at closing? and is anything else necessary to notify the post box where I will receive my mail, I will live in Charlotte. How are packages received routed thru the post office? If it won't fit in the post box?