  The complex scalar quantum field theory with a lambda (phi^*phi)^2
interaction is considered in the Feshbach-Villars formulation. It is shown that
exact few-particle eigenstates of the QFT Hamiltonian can be obtained. The
resulting relativistic few-body equations correspond to Klein-Gordon particles
interacting via delta-function, or ``contact'', potentials. Momentum-space
solutions of the two-body equation yield a `trivial' unity S-matrix.
