Drivers are unwittingly jeopardising their accident insurance by not declaring speeding tickets this summer.
Consumer NZ said almost all insurance companies have a fine-print requirement that drivers inform them about any traffic infringement notices.
Spokesman Hamish Wilson said: "Some insurance companies, given half a chance, will do their best to get out of paying. If you do get booked, check your policy and whether you have to disclose it to your insurance company."
Insurance Council chief executive Tim Grafton said infringement notices must be disclosed every time.