Welcome to The CKB Firm (CKB). CKB maintains its office in Chicago, Illinois and litigates for creditors in Cook County (Chicago) and the surrounding counties, including, Lake, DuPage, Kane and Will County. CKB will represent creditors in all courts in the state of Illinois. This site is designed to provide information about our firm and the services we offer, as well as the ability to submit Collection Claims Electronically.