55 ILCS 5/5-32054
Any property owner may pay the assessment wholly or in part, either before or after it is due and whether or not the assessment has been withdrawn from collection or the property assessed has been forfeited to the State for non-payment of that assessment with the bonds or vouchers issued under this Division on account of that assessment. Such bonds may be applied to the payment of any and all installments, but only such of those bonds may be used as are next in numerical order of redemption at the time of making such payment. In making such payments the vouchers and bonds shall be taken at their par value and interest accrued to the date of making the payment. All vouchers and bonds received in payment of such an assessment shall be cancelled by the officer receiving the vouchers or bonds, as of the date of their receipt and then deposited with the treasurer of the county issuing the vouchers or bonds.
However, when the amount of the assessment is less than that of a bond or voucher, the officer receiving the same shall issue a receipt for the balance which shall entitle the owner to the same rights, except as to negotiability, as if the receipt were the original bond or voucher in the amount of the balance. Any such endorsement on any such bond or voucher shall be made by writing or stamping across the face thereof the words "payments upon this bond (or voucher) are listed upon the back".
55 ILCS 5/5-32054