Y.H.

*302 This appeal presents an issue of first impression in California. M.H. (Father), a child-support obligor, became disabled and applied for Social Security Disability Insurance (SSDI) for himself and his daughter. Family Code section 4504, subdivision (b) requires derivative benefits received by the child of a disabled parent to be credited against a noncustodial obligor's child support. 1 In this case, the Social Security Administration (SSA) took six years to approve Father's application. In 2015, it made a lump-sum payment for past-due derivative benefits to custodial parent Y.H. (Mother), as Daughter's representative payee. In the intervening six years, Father had continued to pay child support and was not in arrears. Does section 4504, subdivision (b) permit retroactive child support credit from Daughter's lump-sum payment where there is no child support arrearage? The trial court determined it does, and we agree. We modify the order solely to correct a clerical error and, as so modified, affirm. 2

*665 FACTUAL AND PROCEDURAL BACKGROUND

Father and Mother married in 2001, separated a year later, and divorced in 2003. Their only child, Daughter, was born in 2002. Pursuant…