A housing society president is seeking advice regarding a member's sister who, armed with an unregistered GPA from her brother (the actual member), is attempting to represent him and interfere in society matters. The consensus is that a GPA holder, especially one who is not a member or associate member and where membership rights are not transferred, cannot validly represent the member. The management committee is advised to refuse this representation and can even take action against the sister for nuisance, consulting a local advocate for guidance.