The federal lawsuit filed Thursday in Chicago accuses Trotter and one of his wine experts of duping them into buying what they thought was a magnum of 1945 Romanee-Conti from the Domaine de la Romanee-Conti winery in June 2012.
The collectors, Bekim and Ilir Frrokaj (Beh-KEEM' and ih-LEER' FRO'-kuh), say an appraisal firm concluded the bottle was counterfeit.
They are seeking damages of more than $76,000. They accuse Trotter and his company of violating Illinois consumer fraud laws.
An attorney for Trotter, John Riccione, did not immediately respond to a message seeking comment on Friday.