What do i check in an open box delivery?

My CMF Phone 1 is arriving tomorrow. I ordered it from filpkart and it offers mandatory open box delivery. What things i should know when recieving the delivery like how can I check if the phone unit is original or not, is there any serial or model number on the box which i can check on any website? And do delivery man also turn on the phone? And this may be a silly questions but do you guys remember how was the package of your mobile box like how was the box covered?