Department of Labor

Connecticut Department Of Labor



CT SIDES Quick Links


Employers and Third-Party Administrators May Use SIDES or SIDES E-Response to Safely and Quickly Exchange Separation Information

SIDES and SIDES E-Response both offer employers and TPAs a secure, efficient, and nationally standardized format to respond electronically to unemployment information requests and separation hearing notices.

SIDES is a secure way for employers and third-party administrators to exchange information with CTDOL and other labor agencies. It can help companies and TPAs reduce paperwork, administrative time, and costs. It is run by the U.S. Department of Labor and replaces the Notice of Claim Filed notice (UC-21A form).

SIDES E-RESPONSE is a free service for employers who are not represented by SIDES participating TPAs or do not have the SIDES service. Connecticut employers must be registered, have an internet connection and a valid email address to use SIDES E-Response.


CT SIDES and SIDES E-Response

  • Eliminate mail delivery delays;
  • Reduce improper payments through ensuring information collection is complete and accurate;
  • Reduce need for follow-up phone calls and paperwork; and
  • Have multiple layers of security to protect data and information.

Get started now. 

Register for SIDES E-Response



Have a question? Contact us:

  • Mailing Address
    Connecticut Department of Labor
    U.I. Technical Unit
    200 Folly Brook Blvd
    Wethersfield, CT 06109
    Phone number:

  • Fax

  • E-mail