The trademark enforcers at Louis Vuitton Malletier S.A. are in a dustup with the University of Pennsylvania Law School over the school’s use of Vuitton marks on an invitation and poster for a March 20 fashion law symposium.

On Feb. 29, Michael Pantalony, Louis Vuitton’s director of civil enforcement for North America, penned a letter to the law school’s dean, Michael Fitts, about the issue.