In overview, the disclosed methods, devices, and systems enable the location of the first device to be verified. In particular, second location verification data is generated using a current location of the second device is provided to a first device by a second device which can be matched with first location verification data received by the first device from a server, the first location verification data is generated using a stored location of the first device. If the first and second location verification data match, the location of the first device is considered to have been verified.