Parramatta have threatened the NRL with legal action even before they learn their fate for alleged salary cap breaches, which is expected to be delivered this week.

The findings from the NRL's long investigation are finally set to be announced on Tuesday, together with an expected competition points penalty and hefty fine.

However the Eels have already marked their territory, preparing to take the battle to court by hiring the services of a law firm last week as they fight for their season.

In a statement to fans on Sunday, Eels chairman Steve Sharp claimed the club has so far been denied an opportunity to discuss the NRL's findings despite their dirty laundry being aired publicly.

"These are the reasons why we sought assurances from the NRL that we will be allowed the chance to discuss our concerns about the investigation before any decisions were made," he wrote.

"To date, this has been denied."

Sharp went on to remind the NRL that any sanction would require a breach notice that allowed 28 days for a response.

"This means we are asking for a fair hearing. For allegations to be tested," Sharp wrote.

"That we have the chance to face our accusers. That if there are penalties, then they are appropriate to the alleged breaches.

"That fact has been distilled from fiction. And that all of the smear and speculation which has so dominated the public arena has not been simply accepted."

AAP