all international packs require sig.
not all do brother. yu can have reg airmail sent that requires no sig. lets assume they came to your house. if they did they left a slip correct. there is a spot for you to sign and leave it in the mailbox. the postman will then deliver your pack the next time with out a signature. case closed.
i like danrojiggs method. i used to make sure it was my postmen or i never took a pack. good thing is i see him on his lucnh break everyday before he hits my spot. lol