A Guardian article claims Al Hasawi, who has said he is close to selling the club, wants wages that could rise to £1m a year, as well as bonuses.
A United States consortium is on the verge of a £50m deal, which would see Al Hasawi retain a 20% stake.
Al Hasawi said "the information published was inaccurate".
"The terms of any potential investment deal are, and will remain, confidential and the club will not be making any comment in relation to this issue," a statement on the club website continued.
"The matter has now been passed to my legal team, as such it would not be appropriate to comment further at this time."
The takeover would see millionaire John Jay Moores, the former San Diego Padres owner, take an 80% stake in Forest.

The Downham Market blaze is believed to have started during the night where a £250,000 fire engine was parked.
The fire station, built in 2006, had no sprinkler system.
Norfolk fire service is still waiting for a full forensic study and said the inquiry was "long and complex" but an independent report had been received.
Cambridgeshire Fire and Rescue Service is assisting with the investigation and their findings reveal it is believed the cause of the fire was due to an electrical fault in one of the appliances at the fire station.
"We are in discussion with Norfolk Constabulary to consider options for a joint location at the site with shared accommodation," a spokesman said.
"We currently have temporary accommodation in place and the station is fully operational from that location."
At the outset the fire service recognised the investigation was going to be a "challenge" for experts.
The fire engine was so damaged and the heat was so intense a forensic investigation was needed but experts were optimistic they would find evidence of a cause.
Head of community safety Stuart Horth said the fire had created concerns.
"Checks have been made at other fire stations to identify potential risks and all were registered as safe," he said.
The £1m single storey fire station  was officially opened in July 2006.
It had an appliance bay where the fire is believed to have started, lecture room, offices, a kitchen and storage areas.
A year before the opening the fire station received a new state-of-the-art rescue pump.
The site was also shared with Norfolk Police and this was said at the time to be a great advantage.

A total of 2,488 medals, each weighing 500g, have been produced - with 812 gold, 812 silver and 864 bronze.
They were made with "sustainability at their heart", say organisers.
The gold medals are free from mercury, the silver and bronze medals are made from 30% recycled materials, and half of the plastic in their ribbons is from recycled plastic bottles.
The designs feature laurel leaves - a symbol of victory in ancient Greece - surrounding the Rio 2016 logo, and organisers say they celebrate "the relationship between the strengths of Olympic heroes and the forces of nature".
In line with the ecological theme of the Games, the podiums on which the athletes will receive the medals are made from organic materials and have been designed to be reused as furniture after the Games.
There are 2,642 Paralympic medals: 877 gold, 876 silver and 889 bronze and each has a device inside that uses tiny steel balls to make a sound when they are shaken, allowing visually impaired athletes to identify the colour by increasing in volume from bronze to gold.
The bronze medals have 16 steel balls and make the lowest sound, the silver medals have 20 balls and the golds have 28, producing the loudest noise.
All of the medals also have the words 'Rio 2016 Paralympic Games' written on them in Braille.
Nottingham Forest owner Fawaz Al Hasawi has denied reports he is demanding a large annual salary and huge bonuses as part of any takeover deal.
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An electrical fault in an appliance parked at a "state-of-the-art" Norfolk fire station caused a disastrous blaze in April last year, a report has said.
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Rio 2016 organisers have revealed the medals that will be competed for at this summer's Olympics.