File on 4 highlights one fraud phone call, in order to shine a light on how scammers work. A man rings a company pretending to be from the bank. How does he persuade a victim he is legitimate? We consider the psychological, financial and emotional impact fraud has on those involved, and we hear from experts hunting the perpetrators.

Producer: Vicky Carter
Reporter: Iona Bain
Technical Producer: Kelly Young
Production Coordinators: Tim Fernley and Jordan King
Editor: Clare Fordham