...is because the clerk "bumps" (stamps) all seams where the tape meets the package and overlaps itself. This insures the tape not being tampered with once it's in the system. Also, not only is "Registered" mail cheaper than all other schedules, it is the safest. Every time that package or container/envelope that registered mail is within... it has to be signed for when it changes hands and when delivered. You can also request (and pay additional) for "Restricted Delivery" with registered mail. This means that only Mary J. Okeelulu can receive the package if it's addressed to her and Harry Okeelulu is not able to. You can also request "Special Delivery" with registered mail.

JB