In 1981, a group of public accountants with a solid professional practice decided to partner to build their own firm, and thus optimize the quality and diversity of their services. Thus, Luis Argüelles Rosenzweig, Francisco J. Chevez Robelo, Fernando Ruiz Sahagún and Ernesto Zamarripa Morones founded, on September 1 of the same year, Chevez, Ruiz, Zamarripa y Cía., S.C. In 1994 the Firm incorporated an area specifically dedicated to Tax Litigation, with attorneys who are experts in the field. Today, through it, we additionally offer our clients services in Administrative Law, Social Security and Local Contributions. In 1996, we expanded our professional practice again, through a new area, specialized in Foreign Trade and in 1997 an area dedicated to Transfer Pricing.