[jptech]

Sagawa (a private courier in Japan) provides a similar service but at your doorstep. Basically the sender registers your info with them (mainly DoB) and upon delivery you have to provide an ID, which the driver checks that it matches with what's written on the envelope, then enters your DoB and other info and your ID number into a portable wireless POS device. Only if they match, you receive the package, and then I believe the info entered into the device gets relayed to the sender.

(Use your translation service of choice if desired.) https://www.sagawa-exp.co.jp/service/kakunin/