Section 2203 Of Article 1. General Provisions From California Elections Code >> Division 2. >> Chapter 3. >> Article 1.

. (a) Cancellation is made by writing or stamping on the affidavit of registration the word "canceled," the reason the affidavit was canceled, and the date of cancellation.
  (b) Whenever a voter transfers his or her registration from one precinct to another precinct in the same county, or reregisters in another precinct in the same county as shown by the new affidavit of registration, the county elections official shall immediately cancel the affidavit of registration from the precinct in which the voter was first registered, and shall remove the affidavit from the file of uncanceled affidavits.
  (c) Except as provided in Section 2119, whenever a voter removes from one county to another county and registers in the latter county, the county elections official of the county in which he or she was first registered, upon being informed of his or her removal either by the voter personally or by receipt of a notice of reregistration under Section 2118, shall likewise cancel his or her registration and remove the affidavit of registration in that county.
  (d) The county elections official in distributing to each precinct the three indexes of registration, as required by Section 2189, shall cross out of those indexes the names of all voters whose affidavits of registration from the precinct have been canceled.