NFC license for the 2N® range of IP intercom devices Verso, Vario, Force, Safety. The 2N® NFC license supports additional functions for the range of 2N® IP intercom devices. The licenses are generated by 2N® according to the serial number of the intercom. After you have ordered your license, you must provide the serial number of your intercom to Securigo who will request the 2N® license key on your behalf. The license comes in the form of an alphanumeric string, so it can be easily sent by email and copied and pasted into the intercom. 2N® Licenses are not time constraints: once purchased, your license will be active throughout life without annual fees.