[baubino]

I worked on a location-based app a few years ago and this was the exact validation method we used (after having learned about it from using NextDoor). It’s incredibly slow and tedious though. We abandoned the app for other reasons but I always wondered how one could continued to manage this approach once network effects kick in and the app really starts to grow.

[patcon]

I think it's a neat service layer: and infra layer that attests to people's addresses -- to break it you need to intercept mail, which is a federal offence in most states. So it piggybacks on assurances of states, even while being nonstate.

In an experimental identity system I prototyped as a civic tech project[1], I paired this with scraping a government "voter registration check" form and comparing against, and it was a two-fold guarantee: someone had to either submit false info to the voter registry or intercept mail. In theory it was very cheap to get very high assurances, for only the cost of a postcard API per user

[1]: https://github.com/patcon/id.c4nada.ca?tab=readme-ov-file#ab...