As i've mentioned in the past (many posts in this forum) about importing and registering a car from overseas, it's not a simple process.
Level of corruption in NZ is very low and for this reason, it's because the gov't authorities like to dot the 'I's and cross the 'T's. Everything straight to the book.
Yep Even needed to provide the invoice for the towbar as it was not on the original order form..
The registration process is very thorough. Inspectors don't like modifications and who's to say that the tow bar was installed by the owner in an improper manner? Their occupation alone takes on a huge risk - if a questionable vehicle slips and causes death, their jobs are at stake so there's a reason why they ask the origin of the installation and bill of sale.