They may or may not. The point is that they have an incentive to accept them back under some circumstances. If they do get one of these back in, perhaps the be

They may or may not. The point is that they have an incentive to accept them back under some circumstances. If they do get one of these back in, perhaps the best thing for them to do is to interview the holder heavily about where he got it and then decide whether to honour it or not.