  We introduce a modification to the standard expression for tree-level
CP-violation in scattering processes at the LHC, which is important when the
initial state in not self-conjugate. Based on that, we propose a generic and
model-independent search strategy for probing tree-level CP-violation in
inclusive multi-lepton signals. We then use TeV-scale 4-fermion operators of
the form $tu\ell\ell$ and $tc \ell \ell$ with complex Wilson coefficients as an
illustrative example and show that it may generate ${\cal O}(10\%)$ CP
asymmetries that should be accessible at the LHC with an integrated luminosity
of ${\cal O}(1000)$ fb$^{-1}$.
