Notwithstanding Section 9050, the personal representative need not give notice to a creditor even though the personal representative has knowledge of the creditor if any of the following conditions is satisfied:
(a) The creditor has filed a claim as provided in this part.
(b) The creditor has demanded payment and the personal representative elects to treat the demand as a claim under Section 9154.
(Enacted by Stats. 1990, Ch. 79.)