Jack Chivers Realty Agents earn ABR Designation. Jack Chivers Realty Published Wednesday, March 30, 2005 D etroit Lakes agents, Mike Ring, Carol Winskowski and James Brouse of Jack Chivers Realty recently earned their Accredited Buyer Respresentative Designation. The Accredited Buyer Representative (ABR) designation is the benchmark of excellence in buyer representation. This coveted designation is awarded by the Real Estate BUYER'S AGENT Council (REBAC), an affiliate of the National Association of Realtors, to real estate practitioners who meet specified educational and practical experience criteria.