A fiscal cash register is a device or software function that records sales for tax reporting, receipt generation, and compliance workflows. In a modern point-of-sale system, it may be built into the payment terminal, linked to a printer, or connected to a cloud service that stores transaction records and fiscal logs.
It matters in cyber security because it handles business-critical data and often sits on the same system that processes payments. If attackers tamper with it, they may alter receipts, hide sales, disrupt reporting, or create gaps in audit trails. Defenders treat it as part of the trusted checkout stack: restrict access, verify updates, monitor logs, separate payment and fiscal functions where possible, and plan for outages. Strong controls help ensure that sales records stay accurate and that the business can prove what was sold.