Tzoi:
But there's no requirement to provide a tax invoice unless requested
Although this is a bit of a tangent, I was told by one company where I asked for tax invoice, and they said they they don't have to provide it for items less than $50. But that doesn't seem to be correct according to https://www.ird.govt.nz/gst/work-out/work-out-records/records-tax/tax-info/tax-info.html

