diff --git a/includes/api/class-wc-rest-orders-controller.php b/includes/api/class-wc-rest-orders-controller.php
index 72b7d0b7418..f348b59f8cb 100644
--- a/includes/api/class-wc-rest-orders-controller.php
+++ b/includes/api/class-wc-rest-orders-controller.php
@@ -162,7 +162,7 @@ class WC_REST_Orders_Controller extends WC_REST_Orders_V2_Controller {
 
 				// Make sure customer is part of blog.
 				if ( is_multisite() && ! is_user_member_of_blog( $request['customer_id'] ) ) {
-					throw new WC_REST_Exception( 'woocommerce_rest_invalid_customer_id_network', __( 'Customer ID does not belong to this site.', 'woocommerce' ), 400 );
+					add_user_to_blog( get_current_blog_id(), $request['customer_id'], 'customer' );
 				}
 			}
 
diff --git a/includes/api/legacy/class-wc-rest-legacy-orders-controller.php b/includes/api/legacy/class-wc-rest-legacy-orders-controller.php
index 8384684eb75..ccc9db267f3 100644
--- a/includes/api/legacy/class-wc-rest-legacy-orders-controller.php
+++ b/includes/api/legacy/class-wc-rest-legacy-orders-controller.php
@@ -251,7 +251,7 @@ class WC_REST_Legacy_Orders_Controller extends WC_REST_CRUD_Controller {
 
 			// Make sure customer is part of blog.
 			if ( is_multisite() && ! is_user_member_of_blog( $request['customer_id'] ) ) {
-				throw new WC_REST_Exception( 'woocommerce_rest_invalid_customer_id_network',__( 'Customer ID does not belong to this site.', 'woocommerce' ), 400 );
+				add_user_to_blog( get_current_blog_id(), $request['customer_id'], 'customer' );
 			}
 
 			$order = $this->prepare_item_for_database( $request );
diff --git a/includes/api/v1/class-wc-rest-orders-controller.php b/includes/api/v1/class-wc-rest-orders-controller.php
index a430e54ebd6..d03863c3bbd 100644
--- a/includes/api/v1/class-wc-rest-orders-controller.php
+++ b/includes/api/v1/class-wc-rest-orders-controller.php
@@ -536,7 +536,7 @@ class WC_REST_Orders_V1_Controller extends WC_REST_Posts_Controller {
 
 			// Make sure customer is part of blog.
 			if ( is_multisite() && ! is_user_member_of_blog( $request['customer_id'] ) ) {
-				throw new WC_REST_Exception( 'woocommerce_rest_invalid_customer_id_network',__( 'Customer ID does not belong to this site.', 'woocommerce' ), 400 );
+				add_user_to_blog( get_current_blog_id(), $request['customer_id'], 'customer' );
 			}
 
 			$order = $this->prepare_item_for_database( $request );
diff --git a/includes/api/v2/class-wc-rest-orders-v2-controller.php b/includes/api/v2/class-wc-rest-orders-v2-controller.php
index 5b312f9a394..c853440ca34 100644
--- a/includes/api/v2/class-wc-rest-orders-v2-controller.php
+++ b/includes/api/v2/class-wc-rest-orders-v2-controller.php
@@ -529,7 +529,7 @@ class WC_REST_Orders_V2_Controller extends WC_REST_Legacy_Orders_Controller {
 
 				// Make sure customer is part of blog.
 				if ( is_multisite() && ! is_user_member_of_blog( $request['customer_id'] ) ) {
-					throw new WC_REST_Exception( 'woocommerce_rest_invalid_customer_id_network', __( 'Customer ID does not belong to this site.', 'woocommerce' ), 400 );
+					add_user_to_blog( get_current_blog_id(), $request['customer_id'], 'customer' );
 				}
 			}