Abstract
This paper is concerned with the existence and uniqueness of solutions for a coupled system of Liouville-Caputo type fractional integro-differential equations with multi-point and sub-strip boundary conditions. The fractional integro-differential equations involve Caputo derivative operators of different orders and finitely many Riemann-Liouville fractional integral and non-integral type nonlinearities. The boundary conditions at the terminal position t=1 involve sub-strips and multi-point contributions. The Banach fixed point theorem and the Leray-Schauder alternative are used to establish our results. The obtained results are illustrated with the aid of examples.