A parcel locker is an automated machine, or a staffed collection point, where post waits until the addressee collects it instead of being carried to a door. The address rules carry two operators' services: Deutsche Post's Packstation in Germany, and Australia Post's Parcel Locker and Parcel Collect, with their abbreviations PCL LKR and PCL COL.
What Spaw answers
address_type reads parcel_locker, and the locker line — PACKSTATION 123 — lands in po_box while is_po_box stays false, because a locker is not a rented box. Otherwise it is handled as a box: it stands in for the street line, and when no street is written beside it no register is asked, so exists stays null. There is no building to confirm.
It carries no risk weight. A checkout that needs a door can branch on address_type itself; the delivery point entry lists the other kinds it can take.
What is not recognised
Only the services named above are read. A locker network whose name the rules do not carry reads as whatever else the address is written as — usually street — so an absent parcel_locker is not proof that an address is a door. A country's page in the address checker lists the words that are read there.