Agency spokesman Andy Knackstedt said that since the registration scams started there have been numerous reattempts.
"These scammers are very persistent, and no sooner do we address and respond to one phishing scam than another one pops up."
An official email sent from Waka Kotahi will include details like your plate number, vehicle make and the licence expiry date on the rego label on your vehicle.
Chief executive of Netsafe Martin Cocker said people are more savvy so scammers are having to increase the quality of their scams.
"One of the ways scammers can do that is to try to replicate what looks close to the activity of a trusted brand.
"This scam very closely replicates an NZTA workflow. The key thing to do is to avoid following links so if you want to go to the NZTA website go directly in your browser."
People are more likely to fall for this kind of scam when there's a time pressure that feels realistic to when they registered their car, Cocker said.
Waka Kotahi advises anyone who has provided driver licence, credit card or banking details to the fraudulent form to put the email in their junk folder and get in contact with Waka Kotahi, their bank, police, and Netsafe.
