Across Europe, the quality requirements for cash transactions are tightened. For example, this year KassenSichV in Germany is presenting cash register manufacturers with challenges in correctly implementing the requirements. The recordings must be made in such a way that manipulation is not possible or immediately apparent. This protection against manipulation usually has to be implemented with elaborate cryptographic methods. In addition, test methods must be used to confirm the quality of the records. In most cases, the mandatory issue of a document about the business case is mandatory.