Homes certified for sustainability by Sustonica, gathered where a guest can find them and book direct. Standard exists. Roster pending.
Built to be handed to the certifier. Until then it lists nothing it cannot source.
Travelers who want to book a lower-impact stay have one option today: a filter on a marketplace that shows a badge next to a listing and sends the commission to the marketplace. The certifier did the work, the manager paid for it, and the only place it is visible is the one place neither of them controls.
This page is where the certified homes would appear as certified, linked to the manager's own site, with the badge page linked so a guest can check it. What it will never show: a self-described 'eco' listing standing in for a certification.
Sustonica certifies individual vacation rentals for sustainability and issues each one a badge page with an ID recorded on a blockchain. The badges exist. What does not exist is any public list of them: no directory, no index of badge pages, and no manager we could find who states the certification on its own listing. Booking.com shows the badge behind a filter; the manager's direct site does not.
So this club has a certifier, a real badge, and no homes, because we will not list a certification we cannot link. It fills the day Sustonica shares the certified list or a manager publishes its badge pages. Either one is enough.
One US management company describes a Sustonica certification journey on its blog (Casiola, Orlando, 2025-26) without naming certified homes. Two UK and Italian owner-operators state the certification on their own sites. No professional manager anywhere publishes badge pages for its homes.