Section 711 Of Chapter 2. Duties And Liabilities Of Attorney From California Probate Code >> Division 2. >> Part 15. >> Chapter 2.

. If a document deposited with an attorney is lost or destroyed, the attorney shall give notice of the loss or destruction to the depositor by one of the following methods:
  (a) By mailing the notice to the depositor's last known address.
  (b) By the method most likely to give the depositor actual notice.