I was informed by my local pack'n'ship company that the all of the major shipping companies (USPS, Fedex, UPS, DHL) will take into account whether or not the bass (or guitar) was shipped in tune. The official word from the books is that all stringed instruments must be completely relieved of tension prior to shipping. I was informed that these companies will take this into account, and be less likely to pay out a claim if the item was shipped at anything above nil tension (i.e. not even loosened by a half/whole step). Basically, to ensure item safety in the first place and security of making a claim if an accident should occur, you must ship stringed instruments at no tension. The shipper said that in his experience it is a good idea to remove the strings entirely, that was if there is a claim to be made the companies can't try to say that you shipped at tension. Up until now I shipped at full tension, but the last few basses I've sent out have been at no tension. What do you guys think?