Quote Originally Posted by stormwheather View Post
So basically they just can do the very same with every parcel also one you dont need to sign for? You just need to receive it.
They have you sign for it to prove that you received it. They've also been known wire packages very discretely so that they are notified when the package is opened. That way they don't have to make you sign for it, but can then swoop in when they get the signal it's opened and catch you in the act.