diff --git a/lib/services/medipost.service.ts b/lib/services/medipost.service.ts
index 39a7d66..150f8dc 100644
--- a/lib/services/medipost.service.ts
+++ b/lib/services/medipost.service.ts
@@ -58,9 +58,18 @@ function parseXML(xml: string) {
   return parser.parse(xml);
 }
 
-export async function validateMedipostResponse(response: string) {
+export async function validateMedipostResponse(response: string, { canHaveEmptyCode = false }: { canHaveEmptyCode?: boolean } = {}) {
   const parsed: IMedipostResponseXMLBase = parseXML(response);
-  if (typeof parsed.ANSWER?.CODE !== 'number' || parsed.ANSWER?.CODE !== 0) {
+  const code = parsed.ANSWER?.CODE;
+  if (canHaveEmptyCode) {
+    if (code && code !== 0) {
+      console.error("Bad response", response);
+      throw new Error(`Medipost response is invalid`);
+    }
+    return;
+  }
+
+  if (typeof code !== 'number' || (code !== 0 && !canHaveEmptyCode)) {
     console.error("Bad response", response);
     throw new Error(`Medipost response is invalid`);
   }
@@ -168,7 +177,7 @@ export async function getPrivateMessage(messageId: string) {
     },
   });
 
-  await validateMedipostResponse(data);
+  await validateMedipostResponse(data, { canHaveEmptyCode: true });
 
   return parseXML(data) as MedipostOrderResponse;
 }