Hi,
Yes it will have live harmless retptile on the box - if it doesn't it's a felony.
Not kidding so don't ask the seller to put it in plain wrapping or anything like that.
You could have it delivered to your workplace or a firends place perhaps then sneak the animal in later?
But the problem with all this is you need the animals enclosure set up and running right before the animal arrives which tends to give the game away. Could you have a neighbour or something get the tank all warmed up and setup right in advance?
"Surprise reptile" isn't really the best idea in practical terms I'm afraid.
dr del