Abstract submitted to the International Europhysics Conference on High Energy Physics July 12 - 18, 2001, Budapest, Hungary _________________________________________________________________________ Search for lepton-flavor violation in ep collisions at HERA ZEUS Collaboration Abstract A search has been made for events due to the reaction ep -> lX, where l denotes a muon or tau lepton with large transverse momentum, with the ZEUS detector at HERA. No evidence for lepton-flavor violation was found. For leptoquark masses below the centre-of-mass energy, limits were set on the couplings of resonantly produced leptoquarks. Limits were also set on leptoquarks with masses above the center-of-mass energy in the context of a contact interaction.