Guesty Setup: Mid-Stay Door Code Update Notifictions

Updated at July 21st, 2026

Create the custom field in Guesty
- Create a reservation-level custom field named exactly: Access Code Change (Post Check-In)
- The field type must be YES/NO (boolean) — not text. Guesty's automation logic can't trigger on "any value entered" in a text field, only on a boolean flipping to YES
- The exact name matters: GNT locates the field by name so the solution can be standardized across accounts
Understand what GNT does automatically (no franchise action needed)
- When a guest changes their reservation dates after check-in (extension or truncation), GNT regenerates the door code
- GNT pushes the new code into the standard key_code field and simultaneously sets the custom field to YES
Build the automation/trigger in Guesty
- Condition: IF "Access Code Change (Post Check-In)" is set to YES
- Action: send the guest a message using a template that includes the updated door code (pulled from key_code)
- Important condition: the automation should only fire for guests who have already checked in — a date change before check-in won't trigger it