<i>But then how exactly is it more secure to accept a cancellation by Random Dude on the phone?</i><p>I suppose if they had some sort of credentials set up for phone access then that would be a point in its favour. My bank do have well established security procedures for me to contact them by phone, for example.<p>To be clear, I am not in any way condoning requiring phone cancellation as a technique for making it artificially difficult or frustrating for someone to cancel when they are within their rights to do so. As you say, it stinks of bad faith.