diff --git a/src/auth/useRegisterPasswordlessUser.ts b/src/auth/useRegisterPasswordlessUser.ts
index d34a479e..bb757da9 100644
--- a/src/auth/useRegisterPasswordlessUser.ts
+++ b/src/auth/useRegisterPasswordlessUser.ts
@@ -21,6 +21,7 @@ import { useClient } from "../ClientContext";
 import { useInteractiveRegistration } from "../auth/useInteractiveRegistration";
 import { generateRandomName } from "../auth/generateRandomName";
 import { useRecaptcha } from "../auth/useRecaptcha";
+import { widget } from "../widget";
 
 interface UseRegisterPasswordlessUserType {
   privacyPolicyUrl?: string;
@@ -39,6 +40,9 @@ export function useRegisterPasswordlessUser(): UseRegisterPasswordlessUserType {
       if (!setClient) {
         throw new Error("No client context");
       }
+      if (widget) {
+        throw new Error("We never register passwordless user in widget");
+      }
 
       try {
         const recaptchaResponse = await execute();