Section 14241 Of Article 3. Challenging A Voter From California Elections Code >> Division 14. >> Chapter 3. >> Article 3.

. A piece of mailed matter returned undelivered by the post office shall not be accepted or used as evidence upon which to initiate a challenge as to residency by any member of the precinct board unless other evidence or testimony is also presented, nor shall the mailed matter, standing alone without other evidence or testimony, be accepted as evidence by the precinct board in determining a challenge.