pretixPOS#
pretixPOS is an app for selling products from a pretix shop at a point of sale such as a ticket office or at the box office at your venue.
You can find information on handling a so-called "technische Sicherheitseinrichtung" with your cash register and pretixPOS on the page Technische Sicherheitseinrichtung (TSE).
You can find a guide on registering a cash register running pretixPOS with the financial authorities in Germany under cash register reporting in Germany.