There is about 50 threads based on this very question, prob could of just popped into one of them to find your answer.
That being said..... You are supposed to be able to ship to another addy. I however was prepping for pre-order on a family members account and it said iPhone had to be shipped to at&t addy. My link:
https://forums.macrumors.com/threads/936616/
So I'm not sure what's up now.