diff --git a/app/controllers/establishment.controller.js b/app/controllers/establishment.controller.js
index e7c7067..db3f6bb 100644
--- a/app/controllers/establishment.controller.js
+++ b/app/controllers/establishment.controller.js
@@ -176,6 +176,8 @@ exports.createEstablishment = async (req, res) => {
     const existingUser = await EstablishmentUser.findOne({
       where: { email: establishment_user.email }
     });
+
+    const checkEmailInAdminUser = await User.findOne({ where: { email, is_active: true } });
     
     if (existingUser) {
       return res.status(400).send({
@@ -184,6 +186,14 @@ exports.createEstablishment = async (req, res) => {
       });
     }
 
+    if (checkEmailInAdminUser) {
+      logger.info(`Email already exists in Admin Users: ${email}`);
+      return res.status(409).send({
+        status: "failed",
+        message: "This email address is already registered in the admin users."
+      });
+    }
+
     //  Create establishment record
     const establishment = await Establishment.create({
       establishment_code: sanitizeStringValue(establishment_code),