What's wrong with just sending money from your acct# to their acct# with a reference number/code to identify that transaction as you, other businesses work this way (such as my power and phone bills from diff. companies), but the NZTA for example requires me to use either a credit card (which is fine) or POLi, which is garbage.

"no one can see your bank details" it says on https://www.polipayments.com/security which is a fraudulent claim, yeah the hell you can, its being sent to your server, not my bank, this is crazy. It also says they don't cache anything -- all kinds of criminals claim they're up to no harm. POLi says they're up to no harm, why should I believe them? There is NO EXCUSE for using POLi vs. just paying with your bank, if a business offers POLi and not bank transfer directly or a credit card, i would never even remotely entertain doing business with them. NZTA is not a business though, it's a government agency. You can do it in person though (transfer ownership of a car for example), or by CC, so whatever, I don't understand who would ever use POLi, the naive? Hopefully they go bankrupt in the near future.