Anything that’s a “first class” letter or parcel (big envelope over 3.5oz or not uniformly flat) under 13oz is protected by the 4th amendment. Anything larger o

Anything that’s a “first class” letter or parcel (big envelope over 3.5oz or not uniformly flat) under 13oz is protected by the 4th amendment. Anything larger or in an actual box can be searched at any time.