A tribunal of this state shall credit amounts collected for a particular period pursuant to any child-support order against the amounts owed for the same period under any other child-support order for support of the same child issued by a tribunal of this state, another state, or a foreign country.
Source:
Section 5700.209, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=FAM§ionNum=5700.209..