diff --git a/src/routes/email.ts b/src/routes/email.ts
index fde2b05..7244bd9 100644
--- a/src/routes/email.ts
+++ b/src/routes/email.ts
@@ -39,8 +39,12 @@ emailRouter.post('/', zValidator('json', sendEmailSchema), async (c) => {
   try {
     const template = getEmailTemplate(templateName, language as Language)
     if (templateName === "welcome") {
-      const dataURL = await generateBarcodeDataURL(data.barcode_content);
-      data.barcode_url = dataURL;
+      if (data.name && data.link && data.barcode_content) {
+        const dataURL = await generateBarcodeDataURL(data.barcode_content);
+        data.barcode_url = dataURL;
+      } else {
+        return c.json({ success: false, error: "required params 'data.name', 'data.link', 'data.barcode_content' not provided" }, 406)
+      }
     }
     if (templateName === "password-reset") {
       if (data.token) {