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  • Medicaid Provider Alert: Provider revalidation has begun and those not completing the process risk disenrollment.  Check your account now to learn when your revalidation is due. More information here.
  • The Cook Central Office, 36 South Wabash Avenue, Chicago, will close 02/03/2025.  The new Cook Central Office will open at 115 South LaSalle, Chicago, for in-person service on 02/10/2025.  
  • ​UPDATE (1/21/2025): The State Disbursement Unit (SDU) has processed all payments impacted by the outage and is back to normal operation. To verify payments, please log into the SDU parent portal or contact the SDU Customer Service Call Center at 877.225.7077.  For SDU business hours, click here.
Elizabeth M. Whitehorn, Director

Account Changes

How do I change my address?

It is critical that you change your address with the Post Office serving your ZIP code, so the Post Office can forward your mail to your new address. To prevent fraud and protect your identity, you must mail or fax the following information to DCSS as well:

  1. Your driver's license number or State ID number;

  2. Your name and Social Security number;

  3. Your old street address, Post Office box number or box number, city and state;

  4. Your new street address, building and apartment number, Post Office box number or box number, city and state.

  5. Your daytime and home phone numbers with area codes;

  6. The "in care of name" if someone is accepting mail for you;

  7. Your signature and the date you began receiving mail at the new address.

Fax the above information to the attention of the Information Processing Unit, 217-524-1218 or mail the information to:

Child Support Services

Attn: Information Processing Unit

P.O. Box 19405

Springfield, Illinois 62794-9405

How do I change my name?

If you wish to change your name, you must mail or fax a written request that includes your previous name and your new name along with legal documentation of your name change.

Fax the above information to the attention of the Information Processing Unit, 217-524-1218 or mail the information to:

Child Support Services

Attn: Information Processing Unit

P.O. Box 19405

Springfield, Illinois 62794-9405