Complaint filed against Casey Anthony attorney Jose Baez

(CNN) -- Florida's bar association will investigate a complaint filed against Jose Baez, incurred while he was defending Casey Anthony, a spokeswoman for the legal group said.

Zannah Lyle, a spokeswoman for the Florida Bar, said the complaint against Baez concerns his handling of when his client -- who was acquitted of murder involving the death of her 2-year-old daughter Caylee -- would serve probation for her past convictions on check-fraud charges.

Baez said, in response, "I am looking forward to the Bar completing its investigation, so that it can be dismissed just like the 20 previous complaints. It is part of the job whenever you fight an unpopular case."

It was not clear Thursday how the complaint originated or who filed it.

The matter revolves around whether Anthony should serve probation after her release from prison, or whether she should get credit for serving her probation while behind bars awaiting trial in her murder case.

Anthony had been convicted of felony check fraud for stealing a checkbook from a friend and writing five checks for $644.25. Orange County Superior Court Judge Stan Strickland ordered her to serve the year of probation following her release in the charges involving her daughter, but a clerk misunderstood the judge and prepared an order that the judge later signed instructing that Anthony would serve the probation while in custody awaiting trial.

The order was updated August 1 to add the words "upon release." But Anthony's lawyers -- including Baez -- contend she cannot be made to serve probation if she served it while in custody under a signed order from Strickland, saying it would violate constitutional protections against having to serve a sentence twice for the same offense.

Orange County Chief Judge Belvin Perry Jr. ruled last week that Strickland's verbal order was binding, and that "to bar the court from correcting a clerical mistake and to permit the defendant to serve probation in jail while awaiting trial on a totally unrelated charge without any possibility of complying with the terms of the probation order would clearly thwart society's interest in extracting a full, fair and just punishment for a crime."

Anthony's attorneys filed an emergency petition with Florida's 5th District Court of Appeal on Wednesday, asking that court to overturn Perry's order before the required date. They also asked the appellate court to strip Perry of further jurisdiction in the case.

In his ruling, Perry wrote that Baez "was well aware that the probation was to begin upon the defendant's release from jail." To use a mistake to seek a result that wasn't the court's intent, according to the judge, "strikes at the very foundation of our justice system."

"While ignorance of the contents of a court order is one thing, the failure to abide by that order and the failure to notify the court of a known scrivener's error in the order may be a violation of an attorney's duty of candor," Perry wrote.

As with all such complaints, a panel of attorneys in the area where the complaint originated -- in this case, in Orlando -- will investigate, said Lyle. That legal panel, after hearing from the accused, could turn over the case to a grievance committee consisting of other lawyers and citizens if it decides that rules regarding professional conduct had been violated.

The grievance committee would then decide if there is probable cause for a violation. Ultimately, the complaint may be heard by Florida's Supreme Court -- with possible penalties for the lawyer including probation, suspension or revocation of his law license, according to Lyle.

In Session's Jean Casarez and Nancy Leung contributed to this report.