Retail Trade, Wholesale Trade, Real Estate, and Personal Services Certification is an assessment process that demonstrates an individual has the skills and knowledge to successfully meet the performance standards established by an industry for an occupational area. The certifications contained in this section are organized by industry sector with links to the certifying entity. Occupation Certification Certification Contact Customer Service Professional National Professional Certification in Customer Service National Professional Certification in Sales National Professional Certification in Retail Management National Retail Federation Foundation Web:    www.nrf.com Real Estate Agent Certified Residential Specialist (CRS) Council of Residential Specialists (Accredited by the National Association of Realtors) Web: www.crs.com Graduate REALTOR® Institute (GRI) National Association of Realtors Graduate REALTOR® Institute Web:www.realtor.org/griclear.nsf/pages/GRIHome