California Code, Government Code - GOV § 84203.3

(a) Any candidate or committee that makes a late contribution that is an in-kind contribution shall notify the recipient in writing of the value of the in-kind contribution.  The notice shall be received by the recipient within 24 hours of the time the contribution is made.

(b) Nothing in this section shall relieve a candidate or committee that makes a late in-kind contribution or the recipient of a late in-kind contribution from the requirement to file late contribution reports pursuant to Section 84203.  However, a report filed by the recipient of a late in-kind contribution shall be deemed timely filed if it is received by the filing officer within 48 hours of the time the contribution is received.