SACRAMENTO — Family courts in Marin and Sacramento counties can’t prove that many of the professionals they hire to sort out emotionally charged custody cases have the required training and experience to do their jobs, according to a state auditor’s report released Thursday.

In Sacramento, seven of 20 court-employed mediators and evaluators couldn’t show the auditor’s staff that they had met qualification and training standards set by state law and the California Rules of Court, the report found. The same was true for seven mediators in Marin County Superior Court, according to the auditor.