[Atlas]

If you need a high level of trust, you can use identity verification services like BlockScore. We see it used when the cost of fraud or misrepresentation is high enough to justify the cost and hurdle of participation. The hurdle being collecting the required information from trusted users. If you want to know more, see blockscore.com.

I have also seen others like Nextdoor use address for verification. If you have a locality-based service, that is a low-cost option that will likely also weed out bad actors because a credit card with valid billing address is required.

[austinjp]

I'd not heard of blockscore.com, thanks. In Googling for a reputable UK equivalent, I noticed that the UK government has decided to roll its own solution "Verify" for its online services [0] previously mentioned on HN [1]

I'd considered postal addresses, similarly to how Google sends (used to send?) codes on postcards to verify ownership of addresses in Maps. Obvious problems with this are (1) time; and (2) it verifies access to a location rather than identity.

A valid credit card, verified with a micropayment a la PayPal, might be a potential way forward. But charging people obviously puts them off, even if it's a token amount.

[0] https://www.gov.uk/government/publications/introducing-govuk...

[1] https://news.ycombinator.com/item?id=10716104

(Edit for clarity.)