Lilguy is giving you bad advise. THe Government has stated they will prosecute steroid cases to the fullest. THe penalties just went up. Pretty sure it's felony for possession plus a few others they will tack on. All to get info.
Dude I'd ask them who it is from and tell them you don't know them. Write it off contact the shipper. For reship to another address that box is done.
WAKE UP! If your in the US the penalties are steep. Go Read the Ryan Haight ACT. THe penalties are the same as Heroin!