The sheriff shall keep public funds in his or her custody, either in his or her office in an amount not in excess of the burglary, theft, and robbery insurance provided, the cost of which is hereby authorized as an expense of the office, or in a depository in an amount not in excess of the security provided pursuant to s. 658.60 and the regulations of the Department of Financial Services. The title of the depository accounts shall include the word “sheriff” and the name of the county, and withdrawals from the accounts shall be made by checks signed by the duly qualified and acting sheriff of the county, or his or her designated deputy or agent.