(CNN) -- The Florida state attorney's office formally filed theft and other charges Thursday against the mother of a missing toddler.
Casey Anthony, mother of missing 3-year-old Caylee Anthony, was charged with grand theft, three counts of fraudulent use of personal identification, three counts of forgery of a check, and three counts of uttering a forged check.
The state attorney's office said the charges stem from $300 in stolen checks from one of Anthony's friends, Amy Huizenga. Huizenga alleges that in July, Anthony stole and wrote three of her checks without her permission and used them at separate Florida Target stores while Huizenga was in Puerto Rico, according to court documents and a police report.
Huizenga said she returned from a week-long trip to Puerto Rico and discovered a zero balance in her bank account.
On August 29, Anthony -- out on bail for charges of child neglect, making false official statements and obstructing a criminal investigation -- was arrested for suspicion of forgery, fraudulent use of personal information and petty theft related to Huizenga's allegations.
After that arrest, she was taken back to jail after the bond for the child neglect and two other charges related to her daughter's disappearance was rescinded.
She remained in jail until last week, when her $500,000 bail was posted anonymously. Anthony is confined to her parents' home and is wearing a monitor, officials said. She will receive weekly visits from a case manager from the Orange County Corrections Department. Watch bounty hunter talk about polygraph refusal »
Anthony and her missing daughter have garnered national headlines and served as fodder for nightly crime shows, which show pictures of the wide-eyed toddler during their coverage.
Caylee disappeared in mid-June, and her mother waited nearly a month before reporting the disappearance. Since then, evidence has mounted that Caylee is dead. Police have labeled Anthony a "person of interest."
Anthony initially explained that she didn't report her daughter missing because she was conducting her own investigation.
Later, she told police she gave Caylee to a baby-sitter. But investigators soon learned that the address she gave them was an apartment that hadn't been occupied for months.
Casey Anthony's mother, Cindy Anthony, insists that the toddler is alive.
Nancy Grace Producer Natisha Lance contributed to this report.