"Lindsay feels this final joke was meant as payback from producers - all because they blame her for holding up the shoot and trashing her trailer.
"She plans to speak to her team this week over the alleged breach of contract."
The working script for the movie is said to make fun of Lohan, who recently had her probation revoked after it was claimed she lied to police over a car accident in June and may go to prison for up to eight months.
It also calls for her to poke fun at her public persona in the opening scenes of the movie, during which she is lying in bed making a sex tape with Anger Management star Charlie Sheen.
According to the script, the actress then says: "Okay but let's do this quick, I got a court hearing in the morning ... It's a driving mishap thing."
Sheen then makes her promise she won't drive, and Lohan replies: "That's very sweet. You're worried about me behind the wheel." He then says: "I'm worried about me. I'm a pedestrian."
It is not yet known if the lines will make the final cut.
- Bang! Showbiz