A free app for Android, by Bundesministerium für Finanzen.
BMF Belegcheck is a free application, developed by the Federal Ministry of Finance (BMF), which makes it possible to check the start and annual receipts of cash registers with a security device (§§6 (4) andRKSV). This application, which can be downloaded on Android devices, provides a service that enables users to obtain a copy of the receipts, which they can then submit to the BMF for verification.
To use this application, users need to provide their mobile phone number and the registration number of the cash register they want to check.
Once this is done, they will receive a confirmation message, stating that their request has been approved.