Not sure about a COA yet. We can probably scan and publish the receipt for our order from the mint publicly (maybe with amounts blacked out) or find some other proof to demonstrate that we are minting there.
We will order once we gain sufficient quantity of orders from everyone.
Yes do you realize that without proof, these could actually be minted from any mint? Almost all Perth numismatic coins come with some sort of COA from them. Their bullions don't but everyone knows what their bullion coins look like, and at the very least the stats are published on their website.
Receipt might be sufficient for some people, but it would still be nice to have a COA for collector's value.