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

Registration and Required Training

Thank you for considering becoming an AYSO referee.

Experienced and new referees must register annually and complete all CA-mandated courses. New referees must complete an online referee class and a field session.

Below are more details: 

  1. Register as a volunteer
    • Click on the "Register Now!" 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. The steps are somewhat confusing, here is a step by step guide to help you through the process.
    • Adults will receive an email from Sterling Volunteers to run a background check. All our volunteers are required to do this.
  2. Take all the California-mandated online training courses.
    • 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. (New referees) Take the online referee class in aysou.org
    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. (New referees) Attend a live session.
    • 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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