Blast from the past

The other thing that seems weird to me is the prevalence of  'impostor' stories - you know, like, The Return of Martin Guerre, or (more recently), Phoenix.  I don't know how anyone could mistake a loved one's voice for someone else's, whether they've been disfigured, or missing for 10 years, or whatever. I mean, one of the dudes at my car repair shop could call me out of the blue in 10 years, and I'd know exactly who he was - voices are as unique as fingerprints. So as a plot point, it just doesn't hold water.