According to a report on TMZ.com, the actress could be facing jail time because she allegedly hasn't followed a judge's orders to attend an alcohol education class once every seven days as part of her punishment for her second DUI conviction.
Lohan's attorney, Shawn Chapman Holley, however, tells PEOPLE: "Though there have been occasional weeks when Lindsay has missed her alcohol treatment class, she has always managed to make up the class the following week by attending two classes. For this reason, we contend that Ms. Lohan is in substantial compliance with the conditions of her probation."
Holley added: "We have received no negative written report from the program."
Reached for comment, Judge Marsha Revel, who's overseeing Lohan's probation, stated she wasn't allowed to speak about pending cases.
"Whether Lohan's in compliance with her probation or not is up to the judge," L.A. Superior Court spokesman Allan Parachini said. "We have no information on this otherwise."
Back in October, Judge Revel sternly warned the starlet not to create any more mishaps in her case otherwise she'd face jail time.
Lohan, 23, was once issued an arrest warrant by the court and her DUI school had complained about her attendance – both of which the actress's attorney said were due to misunderstandings.
The actress has been raising eyebrows lately for her frequent late-night partying, Twitter war with ex-girlfriend Samantha Ronson and for posing with a gun to her mouth during a photo shoot.
Last week, her father, Michael Lohan, brought the police to her home claiming that Lindsay’s sister Ali could be in jeopardy by staying with her big sister.
Lohan’s next hearing is set for May 20.
Meet Sandra Bullock's baby! For the whole story – including photos of her son Louis, an emotional interview about her breakup with Jesse James and her life as a new mom – pick up the new issue of PEOPLE, on newsstands now. Click here to save $1.00 on the issue