How to send documents from a Parcel Locker? [Office 24]

InPost Urząd24 is a service which allows you to deal with official matters using the website urzad24.inpost.pl.

Locate the Parcel Locker of your choice, and then go there with a previously prepared package / documents for the Office. On the Parcel Locker screen select the option "I already have a package with a special label", then scan the bar-code from the label and put the package in the locker. Done!