California Code
CHAPTER 1 - Attorneys and Counselors at Law
Section 286.

286. When an attorney dies, or is removed or suspended, or ceases to act as such, a party to an action, for whom he was acting as attorney, must, before any further proceedings are had against him, be required by the adverse party, by written notice, to appoint another attorney, or to appear in person.

(Repealed and added by Code Amendments 1880, Ch. 35.)