A reselling website is the top result on some people's Google search results for "birth certificates", breaching the search engine's own advertising rules.
"Birthcertificatenz.com" charges $69 to New Zealanders wanting to request a plain birth certificate, something which costs just $33 if done through the government's official website.
Advertising like this is against Google's rules - which prohibits "charging for products or services where the primary offering is available from a government or public source for free or at a lower price". The rules specifically list birth certificates as an example.
The Department of Internal Affairs warned about "dodgy dotcoms" in June, saying hundreds of people have been ordering birth certificates through them.
It said in a fresh statement: "We are currently investigating opportunities to make it harder for third-party sites to facilitate the sale of certificates, such as bot prevention measures, and running Google Ad tests to gather insight into the extent of the third party site's paid ads.