  In this paper we investigated the causality problem present in the recent
work about the Doplicher-Fredenhagen-Roberts-Amorim (DFRA) noncommutative
framework which analyzed the complex scalar field. To accomplish this task we
provided a brief review of the main ingredients of the problem and we
demonstrated precisely that the DFRA algebra obeys the rules of the Canonical
Commutation Relations algebra. This fact permitted us to prove the form of the
DFRA operators previously constructed in the usual way. After that, we
introduced the solution of its Klein-Gordon equation with a source term. Its
solution was accomplished through the retarded, advanced and causal Green
functions constructed in this noncommutative ten dimensional DFRA spacetime. We
believe that this solution constitutes the first step in the elaboration of a
quantum field theory using the DFRA formalism where the noncommutative
parameter is an ordinary coordinate of the system and therefore has a canonical
conjugate momentum.
