It's possible/likely that one day we'll be able to post/mail/deliver stuff to a non-terrestrial vehicle, such as an orbiting vehicle or an extraterrestrialLy landed vehicle, without involving the vehicle's governing organisation (eg NASA).
What would be its address?
Who would have jurisdiction over deciding?
Here are some ideas:
<Recipient> <Name of craft> <Location> (options of LEO, GSO, HEO, Luna, Mars, LMO)