California Code, Family Code - FAM § 556

(a) At the discretion of the county clerk, a couple applying for a marriage license using remote technology may sign their marriage license electronically or by original wet signature. The couple shall transmit a signed, legible copy of their marriage license by United States mail, fax, or electronic means directly to the county clerk, in the manner required by the county clerk.

(b) At the discretion of the county clerk, a marriage license issued using the procedure described in this part may be transmitted to the applicants by United States mail, fax, or electronic means.

(c) Before the solemnization of a marriage pursuant to this part, one or both of the parties to be married shall transmit the marriage license by United States mail, fax, or electronic means to the person solemnizing the marriage and any necessary witnesses, in the manner required by the county clerk.

(d) At the discretion of the county clerk, the person solemnizing the marriage or any necessary witnesses may sign the marriage license electronically or by original wet signature and transmit the signed marriage license by United States mail, fax, or electronic means, in the manner required by the county clerk.

(e) A county clerk who witnesses a marriage solemnized by someone other than the county clerk using remote technology may apply an electronic signature to the marriage license as a witness, and transmit the signed license to the person solemnizing the marriage by United States mail, fax, or electronic means.