diff --git a/classes/bo_availability/bo_info.php b/classes/bo_availability/bo_info.php
index 84ff52cb1..4389ec19e 100644
--- a/classes/bo_availability/bo_info.php
+++ b/classes/bo_availability/bo_info.php
@@ -892,6 +892,32 @@ public static function render_button(
         return $returnarray;
     }
 
+    /**
+     * If billboard is activated, we want to overwrite the warning messages with the billboard text.
+     *
+     * @param booking_option_settings $settings
+     * @param string $role
+     * @param string $label
+     *
+     * @return void
+     *
+     */
+    private static function overwrite_warnings_with_billboard(booking_option_settings $settings, string $role, string &$label) {
+        // TODO maybe implement settings for plugin if billboard is activated.
+        if ($role == 'button') {
+            return;
+        }
+        // Fetch settings of instance to see if alert needs to be overwritten.
+        $instance = singleton_service::get_instance_of_booking_by_bookingid($settings->bookingid);
+        $jsondata = json_decode($instance->settings->json);
+        if (empty($jsondata->billboardtext)) {
+            return;
+        }
+        $formattext = format_text($jsondata->billboardtext);
+
+        $label = $formattext;
+    }
+
     /**
      * To sort the prepages, depending on blocking conditions array.
      * This is also used to determine the total number of pages displayed.
diff --git a/lib.php b/lib.php
index 468d0dfd7..1fd14493f 100755
--- a/lib.php
+++ b/lib.php
@@ -853,6 +853,12 @@ function booking_update_instance($booking) {
     } else {
         booking::add_data_to_json($booking, "disablebooking", 1);
     }
+    if (empty($booking->overwriteblockingwarnings)) {
+        // This will store the correct JSON to $optionvalues->json.
+        booking::remove_key_from_json($booking, "billboardtext");
+    } else {
+        booking::add_data_to_json($booking, "billboardtext", $booking->billboardtext);
+    }
 
     // Update, delete or insert answers.
     if (!empty($booking->option)) {
diff --git a/mod_form.php b/mod_form.php
index 57e9372e9..1ccb4e983 100755
--- a/mod_form.php
+++ b/mod_form.php
@@ -875,6 +875,10 @@ public function definition() {
 
         $mform->addElement('advcheckbox', 'removeuseronunenrol', get_string("removeuseronunenrol", "booking"));
 
+        $mform->addElement('advcheckbox', 'overwriteblockingwarnings', get_string("overwriteblockingwarnings", "booking"));
+        $mform->addElement('textarea', 'billboardtext',
+            get_string("billboardtext", "booking"), null, null);
+
         // Booking option text.
         $mform->addElement('header', 'bookingoptiontextheader',
                 get_string('textdependingonstatus', 'booking'));