2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46442We investigate the possibility of having sizable effects from flavor changing neutral currents at the tree level in a particular class of Two Higgs Doublet Models. Constraints from existing experimental information are discussed. Some interesting signals at the future generation of lepton colliders are illustrated.6 pages, 1 Postscript figures, uses epsf.sty, to appear in the Proceedings of the XXXIst Rencontres de Moriond Les Arcs, France, March 1996High Energy Physics - Phenomenologytext