---
title: "Advance notice: refusing bookings server-side"
description: "Greying out dates on the calendar inside the advance-notice window is separate from refusing bookings for those dates. To have the server also reject…"
url: "https://homerunner.io/docs/how-do-i-make-the-server-refuse-bookings-inside-the-advance-notice-window-not-ju/"
updated: "2026-10-26"
category: Booking engine and checkout
---

# Advance notice: refusing bookings server-side

Greying out dates on the calendar inside the advance-notice window is separate from refusing bookings for those dates. To have the server also reject them, turn on server-side enforcement.

1. Go to **HomeRunner Toolkit > Advance Notice Blocking**.
2. Turn on the **Enforce at booking (server-side)** switch.

With this switch on, quote and reservation attempts inside the notice window are rejected, using the same boundary the calendar greys out. Where a listing has its own synced notice window, that window applies. Otherwise, the global hours setting is used as the fallback.

**A note on the other validation setting.** HomeRunner's separate **Validate advance booking hours** setting measures from each listing's check-in time, so its boundary can differ from the calendar boundary by a few hours. When both settings are active at the same time, the settings page shows a **Conflicting validation is active** notice.

Still stuck? [Contact the HomeRunner team](https://homerunner.io/contact/) with your site address and what you tried, and we take it from there.