The ability of a POS system to record which staff member processed each transaction, applied each discount, issued each refund, or modified a booking, tied to individual login credentials. Staff login accountability reduces internal theft, enables accurate performance tracking, and simplifies dispute resolution when a guest challenges a charge. Without per-employee login tracking, managers cannot attribute specific transactions to specific staff members, making it difficult to identify patterns of unauthorized discounts, refund abuse, or booking errors. Modern integrated booking and POS platforms support role-based access controls that limit what each employee can do based on their assigned permissions.