Klipspringer:freitasm: Change the password. If someone created an account in your name or using your email address then they won't be able to access it after you change it (since no way for them to get the email with reset instructions).
Once you take "ownership" check everything is correct and be done with it.
Tried that. But cannot reset it as its asking 2 security questions which I don't know the answers to.
So its definitely not my account.
From http://www.dia.govt.nz/diawebsite.nsf/wpg_URL/Services-Identity-Verification-Service-Frequently-Asked-Questions?OpenDocument:
You can also contact the igovt Help Desk on 0800 457 4357
Suggest you call them.