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San Mateo County Department of Child Support Services

  • Phone Numbers
    (866) 901–3212 (toll-free 24 hour automated child support system)
    (650) 701–1796 (tdd)
    (650) 366–4711 (fax)
  • Physical Address
    555 County Center – 2nd Floor
    Call Box 8084
    Redwood City, CA 94063
  • Office Hours
    Monday through Friday, 8:00 AM to 5:00 PM
  • Payment Address
    State Disbursement Unit
    P.O. Box 989067
    West Sacramento, CA 95798
  • Web Site
    http://www.smcdcss.com