diff --git a/src/services/invitedNpubService.js b/src/services/invitedNpubService.js
index 1aa3d28..915d97a 100644
--- a/src/services/invitedNpubService.js
+++ b/src/services/invitedNpubService.js
@@ -2,7 +2,14 @@ const uuid = require("uuid");
 
 const InvitedNpub = require('../models/InvitedNpub');
 
+const appInviteService = require('./appInviteServices');
+
 async function createInvitedNpub(inviteUuid, npub) {
+
+    if (await appInviteService.isAppInviteSpent(inviteUuid)) {
+        throw new Error("Can't invite npub, invite is already spent.");
+    }
+
     await InvitedNpub.create({
         uuid: uuid.v7(),
         app_invite_uuid: inviteUuid,