Wisconsin Statutes Health (Ch. 140 to 162) § 154.05. Revocation of declaration

(a) By being canceled, defaced, obliterated, burned, torn or otherwise destroyed by the declarant or by some person who is directed by the declarant and who acts in the presence of the declarant.

(b) By a written revocation of the declarant expressing the intent to revoke, signed and dated by the declarant.

(c) By a verbal expression by the declarant of his or her intent to revoke the declaration. This revocation becomes effective only if the declarant or a person who is acting on behalf of the declarant notifies the attending health care professional of the revocation.

(d) By executing a subsequent declaration.