California Code, Government Code - GOV § 8880.55

(a) No payment by lottery game retailers to the lottery for tickets or shares shall be in cash. All payments for tickets or shares shall be in the form of a check, bank draft, electronic fund transfer, or other recorded financial instrument as determined by the director.

(b) Notwithstanding any other provision of law, the lottery may pay to lottery game retailers, by electronic fund transfer, subject to approval by the Controller's office, any credit balances that may result from lottery activities.