The current affairs documentary set up a fake cosmetics firm Puttana Aziendale – which translates from Italian as "corporate whore" – to sting the TV stars at an event called Celebrity Retreat in a Manchester hotel.
It is understood that Coronation Street actors feature heavily in the current version of the programme despite the legal threats, which were made after a number of "right to reply" letters were sent to individuals who appear in the film.
The one-hour Dispatches film, Celebs, Brands and Fake Fans, will be shown tonight - Monday 5 August - on Channel 4 at 8pm.
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