At the US border, the "border search exemption" enables warrantless bypassing of the 4th Amendment's restriction on search[1], and US vs Ramsey extends this to

At the US border, the "border search exemption" enables warrantless bypassing of the 4th Amendment's restriction on search[1], and US vs Ramsey extends this to mail/parcel.[2] There is an EFF guide on the topic here for anyone interested, with more particular advice: https://www.eff.org/wp/defending-privacy-us-border-guide-travelers-carrying-digital-devices https://www.eff.org/wp/defending-privacy-us-border-guide-tra... [1] https://en.wikipedia.org/wiki/Border_search_exception https://en.wikipedia.org/wiki/Border_search_exception [2] http://www.casebriefs.com/blog/law/criminal-procedure/criminal-procedure-keyed-to-saltzburg/searches-and-seizures-of-persons-and-things/united-states-v-ramsey/2/ http://www.casebriefs.com/blog/law/criminal-procedure/crimin...