Below you find definitions of the terms, which are often used in this context:
The RKSV with explanations regulates the technical details for security systems in the cash register. The security system consists of the chaining of cash transactions with the help of the electronic signature/seal of the signature/sealing unit (SEE). The chain is formed by the inclusion of elements of the last assigned signature/seal stored in the data collection protocol and of the signature/seal which will be created.
The term "cash register" includes all electronic recording systems used to determine and document individual cash transactions. These can be cash registers of various types, in particular server-based recording systems, scales with cash register functions and taximeters.
Cash sales include in addition to cash payments, payments with the cash or credit card (including payments via PayLife Quick and mobile phone), as well as cash checks, distributed vouchers, etc.
Electronic transfers and payments via payment slip are not considered as cash sales.
A receipt is a proof of a single business case that must be handed over by the company to the customer in the event of a cash payment for a delivery or other service. An electronic receipt has to be also considered as proof if it is handed over to the customer immediately after payment has been made. The customer must take the receipt and keep it until he or she leaves the business premises. The customer cannot refuse to take the receipt, and in the case of a check, the customer must present the receipt. If this is not possible, the customer cannot be punished, but the customer has a corresponding obligation to cooperate. The receipt must be issued according to precise standards. For exactly what a receipt must contain, see "Requirements for a document."
The technical security system/manipulation protection
Since January 2017, each cash register must also have a technical security system (manipulation protection). This manipulation protection must be visible on the receipt as a machine-readable code for example as a QR code. This includes a signature value that is required for the signing of cash transactions in the cash register. With the signature, the cash turnovers of the cash register are linked together in chronological order. Data manipulation interrupts the closed cash chain and is therefore detectable. The details of the technical requirements are regulated in the Cash Register Security Regulation.
Data collection log
Each cash register must maintain a data collection protocol. It must record and store each individual cash turnover. For each cash turnover, the required receipt data must be documented. For more details on the data collection log, see "Requirements for a document."
The recorded cash turnovers in the cash register must be continuously sum-up (sales counter). For more details on total storage, see "Requirements for a document."