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We study two- and three-body lepton flavor violating (LFV) decays involvingleptons and neutral vector bosons $V=\rho^0, \omega, \phi, J/\psi, \Upsilon,Z^0$, as well as pseudo-scalar $P=\pi^0, \eta, \eta', \eta_c$ and scalar$S=f_0(500), f_0(980), a_0(980), \chi_{c0}(1P)$ mesons, without referring to aspecific mechanism of LFV realization. In particular, we relate the rates ofthe three-body LFV decays $\tau(\mu) \to 3 \ell$, where $\ell = \mu$ or $e$, tothe two-body LFV decays $(V,P) \to \tau\mu(\tau e, \mu e)$, where $V$ and $P$play the role of intermediate resonances in the decay process $\tau(\mu) \to 3\ell$. From the experimental upper bounds for the branching ratios of$\tau(\mu) \to 3 \ell$ decays, we derive upper limits for the branching ratiosof $(V,P) \to \tau\mu(\tau e, \mu e)$. We compare our results to the availableexperimental data and known theoretical upper limits from previous studies ofLFV processes, and find that some of our limits are several orders of magnitudemore stringent. Using the idea of quark-hadron duality, we extract limits onvarious quark-lepton dimension-six LFV operators from data on lepton decays.Some of these limits are either new or stronger than those existing in theliterature.

Bounds on lepton flavor violating physics and decays of neutral mesons from $\tau(\mu) \to 3 \ell, \ell \gamma\gamma$-decays