The Save Happy Valley Coalition wants a private investigation company prosecuted for hiring spies to infiltrate it.
Solid Energy hired Thompson & Clark Investigations, which then paid a student to join the Happy Valley group and spy on it from within.
Spokesperson Frances Mountier says neither Ryan Paterson-Rouse nor Somali Young, who were hired by the company, were registered or licensed investigators.
She says the coalition and two other activist groups have lodged a complaint with the Private Investigators Registrar, asking to have the matter referred to police.
Ms Mountier says they are also considering a civil suit against the company.
