Section 409.512 - Amendment of financing statement(1) AMENDMENT OF INFORMATION IN FINANCING STATEMENT. Subject to s. 409.509, a person may add or delete collateral covered by, continue or terminate the effectiveness of, or, subject to sub. (5), otherwise amend the information provided in, a financing statement by filing an amendment that:(a) Identifies, by its file number, the initial financing statement to which the amendment relates; and(b) If the amendment relates to an initial financing statement filed or recorded in a filing office described in s. 409.501(1) (a), provides the date on which the initial financing statement was filed or recorded and the information specified in s. 409.502(2).(2) PERIOD OF EFFECTIVENESS NOT AFFECTED. Except as otherwise provided in s. 409.515, the filing of an amendment does not extend the period of effectiveness of the financing statement.(3) EFFECTIVENESS OF AMENDMENT ADDING COLLATERAL. A financing statement that is amended by an amendment that adds collateral is effective as to the added collateral only from the date of the filing of the amendment.(4) EFFECTIVENESS OF AMENDMENT ADDING DEBTOR. A financing statement that is amended by an amendment that adds a debtor is effective as to the added debtor only from the date of the filing of the amendment.(5) CERTAIN AMENDMENTS INEFFECTIVE. An amendment is ineffective to the extent that it: (a) Purports to delete all debtors and fails to provide the name of a debtor to be covered by the financing statement; or(b) Purports to delete all secured parties of record and fails to provide the name of a new secured party of record.