Cal. Welf. & Inst. Code § 10232.5

Alternative payment programs and providers operating or providing services pursuant to this chapter may use a digital signature that complies with state and federal standards, as determined by the department, that may be a marking that is either computer generated or produced by electronic means and is intended by the signatory to have the same effect as a handwritten signature. The use of a digital signature shall have the same force and effect as the use of a manual signature if the requirements for digital signatures and their acceptable technology, as provided in Section 16.5 of the Government Code and in Chapter 10 (commencing with Section 22000) of Division 7 of Title 2 of the California Code of Regulations, are satisfied.