In general, a director is liable for the acts or omissions that occurred during his or her tenure as a director, even after resignation. However, if the director can prove that he or she was not involved in any wrongful act or omission, then the liability may not apply.
Additionally, if the resignation of the director is properly recorded and the necessary filings are made with the Registrar of Companies, then the liability of the director would be limited to the extent of his or her involvement during his or her tenure.