Abstract
Let 1 < n subset of Z(+) and T be a triangular n-matrix ring. This manuscript reveals that under a few moderate presumptions, a map L : T -> T could be a multiplicative Lie N-derivation iff L(X) = D(X) +zeta(X) holds on every X. T, where D : T -> T is an additive derivation and. : T -> Z (T) is a central valued map that disappears on all Lie N-products.