Payment must accompany registrations. If you wish to pay by check or cash, please call MPI PotomacĀ at 202-422-5186 or email info@mpipotomac.org to request a registration form sent to you. Refunds of 75% are available if cancellation is received by April 4, 2023. (Exhibitors is March 31, 2023). No refunds will be given for no-shows. Substitutions are welcome.