Child Support Services › Our Services › Open a Case

Open a Case

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Either parent or custodial party can open a case to establish parentage, child support amount, medical support, enforce a child support order or modify an existing order.

Enrolling in our services is easy!

Online

Apply Online - Simplified Enrollment Process »

By Mail

Call us at 1-866-901-3212 and we will mail the application to you.

In Person

Main Office

8am -5pm
3725 Westwind Blvd Ste 200
Santa Rosa CA 95403

Petaluma Office

Open Thursdays
8:30 AM - 4:00 PM
5350 Old Redwood Highway North Suite 100
Petaluma, CA 94954

Capricorn Location

Open Monday-Thursday
8:00 AM - 5:00 PM
2227 Capricorn Way, Ste 100, Santa Rosa

Sonoma

Wednesdays by appointment only – call 707-565-4010
19080 Lomita Ave
Sonoma CA 95476