diff --git a/src/components/Attendees/PeopleSearch.tsx b/src/components/Attendees/PeopleSearch.tsx
index e74d657..63a8d93 100644
--- a/src/components/Attendees/PeopleSearch.tsx
+++ b/src/components/Attendees/PeopleSearch.tsx
@@ -26,6 +26,7 @@ import {
 } from "react";
 import { useI18n } from "twake-i18n";
 import { ResourceIcon } from "./ResourceIcon";
+import { isValidEmail } from "../../utils/isValidEmail";
 
 export interface User {
   email: string;
@@ -99,8 +100,6 @@ export function PeopleSearch({
     setSnackbarMessage,
   } = useUserSearch<User>({ objectTypes, errorMessage });
 
-  const isValidEmail = (email: string) =>
-    /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);
   const theme = useTheme();
 
   const handleBlurCommit = useCallback(
diff --git a/src/features/Events/api/getUserDataFromEmail.ts b/src/features/Events/api/getUserDataFromEmail.ts
index 8317f55..47cc3f7 100644
--- a/src/features/Events/api/getUserDataFromEmail.ts
+++ b/src/features/Events/api/getUserDataFromEmail.ts
@@ -1,6 +1,10 @@
 import { api } from "@/utils/apiUtils";
+import { isValidEmail } from "@/utils/isValidEmail";
 
 export async function getUserDataFromEmail(email: string) {
+  if (!isValidEmail(email)) {
+    return [];
+  }
   const r = await api(`api/users?email=${encodeURIComponent(email)}`);
   const result: Array<Record<string, string>> = await r.json();
   return result;
diff --git a/src/utils/isValidEmail.tsx b/src/utils/isValidEmail.tsx
new file mode 100644
index 0000000..293ba6d
--- /dev/null
+++ b/src/utils/isValidEmail.tsx
@@ -0,0 +1,3 @@
+export function isValidEmail(email: string) {
+  return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);
+}