From VA DCSE site about the $25 fee

You should have recently received a letter from the Virginia Division of Child Support Enforcement informing you of a $25 federally mandated fee that must be imposed effective Oct. 1, 2007. This letter is not a bill and no action is required on your part. This $25 fee will automatically be deducted from the accounts of custodial parents when Virginia has disbursed at least $500 of support in a Federal fiscal year on each case. This $25 fee is charged to individuals who have never received Temporary Assistance to Needy Families (TANF) in Virginia.

For questions or further information, call (800) 468-8894 or e-mail askdcse@dss.virginia.gov