Systems and techniques are provided that allow for pre-paid return shipping labels to be generated using an automated kiosk or comparable device. A return shipper provides an item to be sent to the initial shipper to the kiosk, which verifies that the item matches the initially-shipped item and generates a suitable return shipping label.

In order to prevent stamps or indicia from being forged and in order to bill a logistics service between different postal service providers correctly to the user, a computer-implemented method for franking postal articles is implemented. The article's progress is recorded by readers and, together with the accompanying franking identification, is stored in blocks of a blockchain as a transaction. In doing so, the assignment of the readers to a postal service provider is recorded. The logistics service provided is billed correctly to the user by analyzing the transactions stored in the blockchain that are to be allocated to at least one postal service provider.