Computer-implemented methods, systems and devices facilitating the methods, and computer-readable medium storing computer readable code, which, when executed, performs the methods are provided for coupon verification. The methods include receiving from a coupon verification terminal via a mobile network a verification data package based on at least an additional verification information and a verification code of a coupon, verifying whether or not the coupon is valid and has not been redeemed, and sending the verification result via the mobile network to the coupon verification terminal. The coupon verification terminal comprises an input module, a CPU configured to provide the additional verification information and to generate the verification data package by encrypting the additional verification information and the verification code, and a mobile communication module configured to, via a mobile network, send the verification data package to a verification server and receive a verification result from the verification server.