diff --git a/backend/app/plugins/wiaas/includes/class-wiaas-delivery-process.php b/backend/app/plugins/wiaas/includes/class-wiaas-delivery-process.php
index 3e02d21..b459820 100644
--- a/backend/app/plugins/wiaas/includes/class-wiaas-delivery-process.php
+++ b/backend/app/plugins/wiaas/includes/class-wiaas-delivery-process.php
@@ -42,6 +42,9 @@ class Wiaas_Delivery_Process {
 		require_once( 'delivery-process/class-wiaas-field-order-document.php' );
 		require_once( 'delivery-process/class-wiaas-field-order-bundle-installation-date.php' );
 
+		// merge tags (for emails)
+		require_once( 'delivery-process/class-wiaas-merge-tag-customer-order-url.php' );
+
 		Gravity_Flow_Steps::register( new Wiaas_Delivery_Process_Step() );
 
 		GFAddOn::register( 'Wiaas_Delivery_Process_Addon' );
diff --git a/backend/app/plugins/wiaas/includes/delivery-process/class-wiaas-merge-tag-customer-order-url.php b/backend/app/plugins/wiaas/includes/delivery-process/class-wiaas-merge-tag-customer-order-url.php
new file mode 100644
index 0000000..14889ff
--- /dev/null
+++ b/backend/app/plugins/wiaas/includes/delivery-process/class-wiaas-merge-tag-customer-order-url.php
@@ -0,0 +1,59 @@
+<?php
+
+if ( ! class_exists( 'GFForms' ) ) {
+	die();
+}
+
+class Wiaas_Merge_Tag_Customer_Order_Url extends Gravity_Flow_Merge_Tag {
+
+	/**
+	 * Name of the merge tag
+	 * 
+	 * @var string
+	 */
+	public $name = 'customer_order_url';
+
+
+	/**
+	 * The regular expression to use for the matching.
+	 *
+	 * @var string
+	 */
+	protected $regex = '/{customer_order_url(:(.*?))?}/';
+
+
+	public function replace( $text ) {
+
+		$matches = $this->get_matches( $text );
+
+		if ( ! empty( $matches ) ) {
+
+			$entry = $this->entry;
+
+			$form = GFAPI::get_form($entry['form_id']);
+
+			$order_field = GFCommon::get_fields_by_type($form, 'wiaas_order')[0];
+
+			if (empty($order_field)) {
+
+				return $text;
+			}
+
+			$order_id = $entry[$order_field->id];
+
+			$url = WIAAS_CUSTOMER_INTERFACE . '/orders/' . $order_id;
+
+			$link = sprintf( '<a href="%s">%s</a>', $url, 'Order' );
+
+			foreach ( $matches as $match ) {
+				$full_tag = $match[0];
+
+				$text = str_replace( $full_tag, $link, $text );
+			}
+		}
+
+		return $text;
+	}
+}
+
+Gravity_Flow_Merge_Tags::register( new Wiaas_Merge_Tag_Customer_Order_Url );
\ No newline at end of file