Children in New York City are being placed with foster parents who haven’t passed the necessary background checks or received training, according to a new report from City Comptroller Scott Stringer.

Stringer's office audited files for 110 foster homes and found that 81 percent were not properly certified. He faulted the Administration for Children’s Services for failing to adequately oversee the non-profits it hires to coordinate foster home placement.

“The stakes are very high,” he said. “These are children. We want to make sure that all the certifications are met before a child goes to a foster home.”

Prospective foster parents have to receive training, pass medical and criminal background checks, provide references, and have their homes inspected before being certified.

A spokeswoman for ACS, Marisa Kaufman, disputed Stringer’s findings and said the agency already does everything the report recommends.

"There are significant inaccuracies in this report,” she said. “Regardless, ACS goes beyond the legal requirements in its oversight of foster homes.”

Monica Mahaffey, a spokeswoman for the New York State Office of Children and Family Services said they were “alarmed at the information contained in the comptroller’s report.”

“[We] will be requiring that ACS share its corrective action plan with the state for additional monitoring.”