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Al Hasawi, who took control of the Reds in the summer of 2012, would not reveal the identity of the buyers.
However, BBC Sport understands that a United States consortium, led by millionaire John Jay Moores, is on the verge of securing a £50m deal.
The takeover would see the former San Diego Padres owner take an 80% stake in the Championship club.
Moores' consortium were previously interested in buying Premier League side Everton, and the potential new owners met club staff last week.
Nottingham Forest owner and chairman Fawaz Al Hasawi says he is close to agreeing a deal to sell the club.