Section 617.0807 - Resignation of directors(1) A director may resign at any time by delivering written notice to the board of directors or its chair or to the corporation.(2) A resignation is effective when the notice is delivered unless the notice specifies a later effective date. If a resignation is made effective at a later date, the board of directors may fill the pending vacancy before the effective date if the board of directors provides that the successor does not take office until the effective date.s. 43, ch. 90-179; s.84, ch. 97-102.