When any agreement provides for periodic payments to be made by the obligor to the obligee, which payments are to include taxes or insurance, or both, with respect to the property covered by the agreement, and the amount of such periodic payments is increased by reason of an increase in taxes or insurance premiums, or both, the obligee must, upon written request of the obligor, mail or deliver to the obligor an itemized statement showing the respective amounts of each payment applied to taxes, insurance, and other items.