Orlando, Florida (CNN) -- A Michigan inmate with a history of filing documents in the Casey Anthony case has filed a fake motion asking for her attorney to be removed, officials in Florida said Tuesday.
Curtis Jackson recently filed a motion on behalf of Anthony -- who is charged with killing her daughter, Caylee -- asking for the removal of defense lawyer Jose Baez.
Baez said he was surprised by a local media report on the filing, but not by the source. Jackson has contacted several parties in the case on several matters, Baez said on "In Session" on truTV.
"He's been incarcerated all this time," the lawyer said.
"There is not even shred of truth" in Jackson's handwritten motion, Baez said, adding he still represents the defendant.
The motion states that Baez has "not conscientiously protected the defendant's interest and diligently represented her."
Anthony, 25, faces a capital murder charge in the death of 2-year-old Caylee. The girl was reporting missing in July 2008, and investigators found her body after five months of searching.
The trial is expected to start sometime next month.
Jackson, 35, is serving sentences for bribery and other crimes at a prison in Baraga, according to the Michigan Department of Corrections website. He was sentenced in July 2008.
Previous discovery documents from Jackson include a letter and affidavit in which he claims Casey Anthony asked him about hiring a hit man.
Karen Levey, spokeswoman for the 9th Judicial Circuit Court of Florida, confirmed Jackson is not connected to the case.
Orange County Clerk of Courts Leesa Bainbridge said on "In Session" that anyone can file documents in a case if the papers are signed and have a valid case number. It is up to a judge to review the documents and make a ruling, she said.
"You don't want the clerk's office having discretion as to what is legitimate or not," Bainbridge said. "We are not lawyers or judges. We are there to make sure that everything given to us is put in file to be considered so that justice can proceed."
In Session's Aletse Mellado and Adam Blank contributed to this report.