In most Western countries, an act that is discriminatory at face value isn't a crime if there is a good reason for it. Here in the UK, for example, it's called

In most Western countries, an act that is discriminatory at face value isn't a crime if there is a good reason for it. Here in the UK, for example, it's called "a proportionate means of achieving a legitimate aim". Avoiding demonstrable fraud would be a legitimate aim and I can't see any court or tribunal disagreeing with it.