Whether the employer's standing objection was barred by abuse of rights because it had previously relied on the same assignment.
The employer acted inconsistently: after asserting in the first case that the employee had assigned the claim, it could not later deny the validity of that assignment. The objection was therefore abusive and ineffective.
A party may not adopt a position contrary to one previously taken in the same matter when the other side relied on the earlier stance; this is venire contra factum proprium under Art. 52 CPC and Art. 2(2) CC.