(2) With respect to a consumer credit sale or consumer loan whenever any scheduled payment is at least twice as large as the smallest of all earlier scheduled payments other than any down payment, any writing purporting to contain the agreement of the parties shall contain language in form and substance substantially similar to the following: THIS CONTRACT IS NOT PAYABLE IN INSTALLMENTS OF EQUAL AMOUNTS: Followed, if there is only one installment which is at least twice as large as the smallest of all earlier scheduled payments other than any down payment, by: AN INSTALLMENT OF $.....WILL BE DUE ON.......... or, if there is more than one such installment, by: LARGER INSTALLMENTS WILL BE DUE AS FOLLOWS:
(The amount of every such installment and its due date shall be inserted).