Corporate access control Commercial facilities and secure locations often use plastic ID cards for staff or residents. QR codes are a cost-effective way to provide simple and easy-to-manage access control services. The phone number of any guests can be recorded upon entry, and a QR code can be forwarded to the registered number. The code can be designed in a way that provides only selective access to various locations. Furthermore, when displaying an access code on a smartphone, dynamic QR codes can be used. These change at regular intervals, making it almost impossible for the code to be re-used by anyone else. There are no cards to purchase, print or distribute so it reduces time-consuming manual processes.