Abstract
We study a coupled system of Caputo fractional differential equations with coupled non-conjugate Riemann-Stieltjes type integro-multipoint boundary conditions. Existence and uniqueness results for the given boundary value problem are obtained by applying the Leray-Schauder nonlinear alternative, the Krasnoselskii fixed point theorem and Banach's contraction mapping principle. Examples are constructed to illustrate the obtained results.