Mandatory written booking confirmation on durable medium.
Adriatic bookings: Dubrovnik, Split, Hvar, Istra — WhatsApp + SMS check-in
Small hosts in Dubrovnik or Hvar have no reception. Pre-arrival WhatsApp with address, lock code and Wi-Fi is the difference between 4- and 5-star Booking review.
Guest data destroyed after 12 months.
PMS / channel manager webhook
Out-of-the-box: Booking.com, Airbnb, Vrbo, Mews, Cloudbeds, eviivo.
3-step message flow
T-7d destination info; T-1d smart lock code; T+2h 'Everything OK?'.
Smart-lock integration
Webhook with Nuki, August, TTLock — code valid check-in 14:00 to check-out 11:00.
json
{ "template": "checkin_t_minus_1d", "channels": ["whatsapp", "sms"], "recipient": { "name": "James O'Connor", "phone": "+447712345678", "lang": "en" }, "booking": { "ref": "VIL-DBR-2026-3892", "property": "Villa Adriatica, Dubrovnik", "arrival": "2026-06-14T14:00:00+02:00", "smart_lock_code": "8421" } }Villa Adriatica: Tomorrow we're expecting you! Address: Dubrovnik 14. Lock code: 8421. Check-in after 14:00. Wi-Fi: stay.example.hr/wifi
- PMS integration active
- WhatsApp Business templates approved
Meta-approved WhatsApp templates + off-the-shelf smart-lock — from booking to working check-in in <30 min.
What if guest has no WhatsApp?
4notify checks WhatsApp Business by number. If unavailable, auto SMS + email fallback.
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14 days, no card. Support in Croatian and English.