TeesPAY is a platform for prepaid payment and access management in closed loop environments. Users top up a balance and transact at the terminal with a QR code.

The terminal hardware is designed in house. Unlike card based systems there is no physical card distribution and no lost card problem. QR codes are rotated at short intervals and verified with an asymmetric signature, so a screenshot cannot be reused.

Field terminals connect to the centre over VPN and no ports are exposed on the cloud side.