All salaries of elective and appointive state officers shall be full compensation for all official services. All fees, which are not otherwise by the laws of this state directed to be deposited in a special fund or disbursed for a special purpose, received or charged by any elective or appointive officer or deputy state officer for any act or service rendered in the officer’s official capacity must be accounted for and paid over by the officer monthly to the state treasurer and must be credited to the general fund of the state.