No agent, attorney or other person pursuing or in charge of the preparation or filing of any claim for benefit under this Title shall demand or charge for his services any fee, and any stipulation to the contrary shall be null and void. The retention or deduction of any amount from any benefit granted under this Title for the payment of fees for such services is prohibited. Violation of any provision of this Article shall be punished by a fine of not less than Five Hundred Pesos nor more than Five Thousand Pesos, or imprisonment for not less than six months nor more than one year, or both, at the discretion of the court.