(a) A payor or collecting bank's authority to accept, pay, or collect an item or to account for proceeds of its collection, if otherwise effective, is not rendered ineffective by interdiction of a customer of either bank existing at the time the item is issued or its collection is undertaken if the bank has not received written notice, addressed to the bank, of an adjudication of interdiction. Neither death nor interdiction of a customer revokes such authority to accept, pay, collect, or account until receipt of a notice by the bank, addressed to the bank in writing, of the fact of death or of an adjudication of interdiction and the bank has reasonable opportunity to act on it.
(b) Even following the receipt of such notice, a bank may for ten days after the date of death pay or certify checks drawn on or before that date unless ordered to stop payment by a person claiming an interest in the account.