Guest registration: SES, Mossos and Ertzaintza
Which authority applies to your property, and how Keyio decides where to submit a guest.
The registration flow
You send guests a magic-link form (or they fill it in on check-in), they enter their details and scan their ID, and Keyio prepares the submission the way each authority actually expects it: sent directly for SES, as a downloadable TXT file for Mossos d'Esquadra, and as a downloadable XML file in the Ertzaintza's official format — you upload those two on each police portal (for the Ertzaintza, in the Registro Hostelero's “Envío fichero” tab). Before generating either file Keyio checks the data against that authority's rules and lists anything it would reject. Configure your SES credentials, Mossos police ID or Ertzaintza establishment code once per property from its compliance settings.
Sending the link: email or WhatsApp
From a booking, send the guest self-registration link by email or WhatsApp to one or more of the booking's renters — you pick the recipients and the channel each time. WhatsApp delivery uses a Meta-approved WhatsApp Business Content Template sent via Twilio, so it only reaches renters with a phone on file; email needs no phone and is always available.
You can also have this link go out automatically ahead of check-in instead of sending it by hand each time — see "Auto-sending the registration link before check-in" below.