On behalf of consumers in New Mexico and Colorado, Treinen Law Office sues credit reporting agencies and the businesses that report to these agencies, payday and title lenders, mortgage companies, mortgage brokers, car dealers, debt collectors and other businesses, both on an individual and a class basis.

Rob Treinen's efforts on behalf of consumers have resulted in over 30 published opinions favorable to consumers from the New Mexico Supreme Court, the Tenth Circuit Court of Appeals and lower courts, including opinions that struck down unfair arbitration schemes used by rip off businesses. Some of these lawsuits have also resulted in favorable press coverage.