Section 5. As to acts undertaken in good faith reliance thereon, an affidavit executed by the attorney in fact under a power of attorney, durable or otherwise, stating that he did not have, at the time of exercise of the power, actual knowledge of the termination of the power by revocation or of the death, disability or incapacity of the principal shall be conclusive proof of the nonrevocation or nontermination of the power at that time. If the exercise of the power of attorney requires execution and delivery of any instrument that is recordable, such affidavit when authenticated for record shall be likewise recordable. This section shall not affect any provision in a power of attorney for its termination by expiration of time or occurrence of an event other than express revocation or a change in the capacity of the principal.