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American Youth Soccer Organization Providing world class youth soccer programs that enrich children's lives.

Registration and Required Training

All experienced and new referees must register annually and complete all California-mandated courses. New referees must complete the online referee class and attend a field session.

Below are more details: 

  1. Register as a volunteer.  New and returning volunteers must complete this. Time: 10 minutes.
    • Click on the "Register Now!" button in the section below.
    • Youth referees must create their own account separate from their parent's, otherwise they won't get credit for their online classes
    • Once signed in, Click the "Select" button on the "Referee" box; click "View Divisions" button and follow the next steps on the page. 
    • Adults will receive an email from Sterling Volunteers to run a background check. All our volunteers are required to do this.
  2. Take the California-mandated online training courses. New and returning volunteers must complete this, they take approx. 1hr to complete.
    • Sign in to aysou.org using the same credentials from Step 1, and
    • complete all the "Safe Haven Courses" in the Online Courses tab: save haven, concussion awareness, and sudden cardiac arrest.
  3. Do the online referee class in aysou.org.  This is only for new referees who have not been certified. Time: 1hr.
    1. To referee 8-and-younger age groups: complete the 8U Referee certification , or
    2. To referee all age groups: complete the Regional Referee certification 
  4. Attend a live session. Only for new referees who are not certified. 
    • For 8-and-under referees the session is 30 minutes long. Check the U8 referee page for sessions. 
    • For Regional Referees the field session is about 1 hour long. Check the U10+ referee page for sessions.
    • We have an excellent mentoring program and voluntary continuing education program to help improve your referee skills! 
For questions or comments about the referee program please contact the Foster City AYSO Referee team at [email protected]

Register now!

MY2021 Referee Enrollment

This is the Foster City AYSO volunteer registration program for Adult (18+) and Youth (12-17) referees for Membership Year 2021. This program is open to new and returning referees. Youth referees are required to upload copy of birth certificate or passport to verify age.

In addition to specific AYSO training, all AYSO adult volunteers are required to undergo a background check through Sterling Volunteers. The background check is only done one time. If you are signing up for multiple volunteer positions, then it will be performed for the first volunteer position only. Foster City AYSO will pay the $25 volunteer membership fee associated with the background check.

Youth referees do not have to undergo the background check.

Thank you again for supporting Foster City AYSO! Your contribution is extremely valuable...

Adult Referee (Age 18 and older)


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$0.00

Youth Referee (Ages 12-17)


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$0.00

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Contact Us

Foster City AYSO

PO Box 4270 
Foster City, California 94404

Email Us: [email protected]
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