We extend the effective theory of Minimal Lepton Flavor Violation (MLFV) by including four-lepton operators. We compute the rates for µ → 3e and τ → 3ℓ decays and point out several new ways to test the hypothesis of MLFV. We also investigate to what extent it will be possible from (future) experimental information to pin down the contributions of different effective operators. In particular we look for experimental handles on quark-lepton operators of the typel i Γℓ j ×qΓq by working out their contribution to hadronic processes such as τ → µπ 0 , π 0 → µē, Υ → τμ, as well as to purely leptonic decays such as µ → 3e through loop effects.