Cal. Unemp. Ins. Code § 13072
The department may by notice, served personally or by first-class mail, require any employer, person, officer or department of the state, political subdivision or agency of the state, including the Regents of the University of California, a city organized under a freeholders' charter, or a political body not a subdivision or agency of the state, having in their possession, or under their control, any credits or other personal property or other things of value, belonging to a taxpayer or to an employer or person who has failed to withhold and transmit amounts due pursuant to Section 13070 or 13073 to withhold, from such credits or other personal property or other things of value, the amount of any tax, interest, or penalties due from the taxpayer or the amount of any liability incurred by such employer or person for failure to withhold and transmit amounts due from a taxpayer and to transmit the amount withheld to the department at such times as it may designate.
Ca. Unemp. Ins. Code § 13072