A civil liberties campaigner says he wants to see checks on companies that collect personal information from travel cards used in New Zealand.
The Snapper public transport card in Wellington and an integrated ticketing system being developed in Auckland can record passengers' movements and require cardholders to register their name and contact details.
Registration is not compulsory.
Both Auckland Transport and Snapper say the information will not be used illegally and will be used to enhance transport services.
But Auckland privacy lawyer Tim McBride says random audits should be carried out by the likes of the Privacy Commission to ensure the peoples' privacy is being protected.
The Council for Civil Liberties agrees there should be some form of audit.