Isaac Colunga is a Partner in the Business Litigation Group in Chicago and DuPage County, Illinois.  Isaac defends clients in federal courts around the country in consumer class actions, and he represents clients in contract and business disputes at the trial and appellate levels.

Isaac concentrates on the Telephone Consumer Protection Act (TCPA) and its corresponding regulations, and he has defended clients in numerous TCPA class actions nationwide, most recently in federal district courts in California, Florida, Illinois, Maryland, Michigan, Missouri, New Jersey and Ohio.  He defends TCPA cases involving junk fax advertisements and autodialed calls to cell phones, in particular, and he also provides compliance counseling and defends companies that use cloud-based and other technologies to initiate fax, phone call and text messaging campaigns.  Isaac also regularly defends clients in consumer protection suits alleging violations of the Fair Credit Reporting Act and the Fair Debt Collection Practices Act.  Outside of litigation, Isaac advises clients on other telemarketing-related statutes, such as state telemarketing laws and the CAN-SPAM Act of 2003.  Isaac’s clients range from middle market companies to multi-national and publicly-traded corporations that hail from a variety of industries, such as pharmaceutical, retail, communications, supermarket chains, software and technology, healthcare, information and delivery, cosmetics, consumer goods and staffing.   
Isaac also represents companies and executives in disputes that arise out of business transactions, business ownership and competitive business environments.  These include breach of contract suits, and cases involving the full range of business torts: breach of fiduciary duty, tortious interference with contract, misrepresentation, fraud, interference, defamation and others.  As part of this work, Isaac routinely prosecutes claims for violations of non-compete agreements and misappropriation of trade secrets.  He has successfully obtained injunctive relief on behalf of his clients to enforce their restrictive covenants, to maintain customer relationships and to prevent the loss of intellectual property.
In addition, Isaac has assisted employers with investigating and litigating claims for employment discrimination, wage and hour violations, human rights claims and harassment.  He has represented clients before the Illinois Department of Employment Security, the Illinois Department of Labor, the Illinois Department of Human Rights and in state and federal courts throughout Illinois in such cases.
Isaac served as a law clerk to the Honorable Charles R. Norgle of the United States District Court for the Northern District of Illinois. 
He received his J.D. from The John Marshall Law School in Chicago, where he served as an editor for The John Marshall Law Review and received First Prize in the Braun Memorial Writing Competition.  He holds a Master’s degree from the University of Chicago and a B.A. from Tulane University.
In addition to his law practice, Isaac comments and writes frequently on a variety of legal topics. His publications have appeared in the Chicago Daily Law Bulletin, the Illinois Bar Journal, the Valparaiso University Law Review and the University of Toledo Law Review.  He served previously on the Illinois Bar Journal's Editorial Board and on the Illinois State Bar Association’s Federal Civil practice committee.  He currently serves as an adjunct professor of legal writing at The John Marshall Law School.
Reported and Representative Cases
Representative Matters
Business Disputes
  • Represented a large consortium of member-distributors in suit seeking a declaratory judgment regarding the proper ownership of millions of dollars in accounts receivables
  • Represented one of the nation's leading providers of rehabilitation and therapy services in multi-state, multi-defendant federal lawsuit alleging claims for breach of contract, misappropriation of corporate information and interference with contract.
  • Represented the world's leading source of commercial information in federal suit seeking damages for defamation and intentional interference with prospective business relations
  • Represented multi-national software developer and successfully obtained injunctive relief against former consultant for allegedly misappropriating and misusing the company's proprietary software code, designs and processes
  • Represented large underground utility servicer in dispute over the terms of an asset purchase agreement 
Consumer Protection Defense and Class Actions
  • Represented the world's leading source of commercial information in TCPA class action involving auto-dialed calls to cell phones
  • Represented a leading cloud-based software provider in TCPA class action involving targeted text messages to cell phones
  • Represented merchant data security provider in TCPA class action involving alleged unsolicited fax advertisements
  • Represented national physician staffing firm in two TCPA class actions pending Missouri and Maryland related to the alleged sending of unsolicited faxes
  • Represented one of the world's largest grocery retailers in TCPA suit alleging that the company's prescription refill authorization system attempted to send unauthorized faxes
  • Represented nationwide restaurant chain in TCPA class action involving franchisee's alleged fax marketing campaign
  • Represented one of the nation's largest municipal entities in FCRA class action alleging the publication of too many credit card numbers on customer receipts
  • Represented nationwide staffing agency in FCRA suit involving improper use of credit information during hiring process
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