We have a number of checks in place. First and foremost we trust our riders – they've been frustrated by bike theft for so long that we have faith in them not to abuse the system. Secondly, we're able to track whether the bike was locked or unlocked when stolen – if it was unlocked then the guarantee does not apply. Finally, we don't stop searching for the bike after the two weeks is up – if we later recover the bike, then any fraudulent activities will be investigated by the police.