Child support and SSI fraud

I found the following from this link :
http://www.ssa.gov/policy/docs/policybriefs/pb2004-02.pdf

Under current law, the Social Security Administration (SSA) excludes one-third of child support payments received in a month on behalf of a child on Supplemental Security Income (SSI) from countable income in determining the SSI payment.

So it sounds like two-thirds of child support is countable towards SSI income levels. If this child support is not reported to the SSA, there may be an issue there.

You can anonymously report fraud here :
http://www.ssa.gov/oig/hotline/index.htm
https://www.socialsecurity.gov/oig/public_fraud_reporting/form.htm