diff --git a/.husky/pre-commit b/.husky/pre-commit
old mode 100755
new mode 100644
diff --git a/controller/department.js b/controller/department.js
index fa0bd42..2957d72 100644
--- a/controller/department.js
+++ b/controller/department.js
@@ -4,7 +4,10 @@ import {
   listdepartment,
   deletedepartment,
 } from "#services/department";
-
+import { isEntityIdValid } from "#middleware/entityIdValidation";
+import Accreditation from "#models/accreditation";
+import Infrastructure from "#models/infrastructure";
+import Organization from "#models/organization";
 import { logger } from "#util";
 
 async function addDepartment(req, res) {
@@ -16,19 +19,37 @@ async function addDepartment(req, res) {
     infrastructures,
     organization,
   } = req.body;
+  const isAccredationValid = await isEntityIdValid(
+    accreditations,
+    Accreditation,
+  );
+  const isInfrastructureValid = await isEntityIdValid(
+    infrastructures,
+    Infrastructure,
+  );
+  const isOrganizationValid = await isEntityIdValid(organization, Organization);
+
   try {
-    const department = await createnewdepartment(
-      name,
-      acronym,
-      yearOfStarting,
-      accreditations,
-      infrastructures,
-      organization,
-    );
-    res.json({
-      res: `added Department successfully ${department.name}`,
-      id: department.id,
-    });
+    if (!isAccredationValid && !isInfrastructureValid && !isOrganizationValid) {
+      const error = "";
+      if (!isAccredationValid) error.concat("Invalid Accreditation");
+      if (!isInfrastructureValid) error.concat(" Invalid Infrastruction");
+      if (!isOrganizationValid) error.concat(" Invalid Organization");
+      res.status(400).json({ err: error });
+    } else {
+      const department = await createnewdepartment(
+        name,
+        acronym,
+        yearOfStarting,
+        accreditations,
+        infrastructures,
+        organization,
+      );
+      res.json({
+        res: `added Department successfully ${department.name}`,
+        id: department.id,
+      });
+    }
   } catch (error) {
     logger.error("Error while inserting", error);
     res.status(500);
diff --git a/test/routes/department.test.js b/test/routes/department.test.js
index 18820f4..2444e75 100644
--- a/test/routes/department.test.js
+++ b/test/routes/department.test.js
@@ -1,11 +1,17 @@
 import { jest } from "@jest/globals"; // eslint-disable-line import/no-extraneous-dependencies
-import mongoose from "mongoose";
 import departmentmodel from "#models/department";
 import connector from "#models/databaseUtil";
+import accreditationModel from "#models/accreditation";
+import infrastructureModel from "#models/infrastructure";
+import organizationModel from "#models/organization";
 
 jest.mock("#util");
 const { agent } = global;
 
+let accreditationIds;
+let infrastructureIds;
+let organizationIds;
+
 // test case for deletion
 
 function cleanUp(callback) {
@@ -14,9 +20,9 @@ function cleanUp(callback) {
       name: "Electronics",
       acronym: "COMPS",
       yearOfStarting: "2020-09-01T00:00:00.000Z",
-      accreditations: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03a")],
-      infrastructures: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
-      organization: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
+      accreditations: [accreditationIds],
+      infrastructures: [infrastructureIds],
+      organization: [organizationIds],
     })
     .then(() => {
       connector.disconnect((DBerr) => {
@@ -26,6 +32,21 @@ function cleanUp(callback) {
     });
 }
 
+/* eslint-disable no-underscore-dangle */
+async function getIds(callback) {
+  accreditationIds = await accreditationModel.read({}, 1);
+  accreditationIds = accreditationIds.data[0]._id;
+  infrastructureIds = await infrastructureModel.read({}, 1);
+  infrastructureIds = infrastructureIds.data[0]._id;
+  organizationIds = await organizationModel.read({}, 1);
+  organizationIds = organizationIds.data[0]._id;
+  callback();
+}
+
+beforeAll((done) => {
+  getIds(done);
+});
+
 afterAll((done) => {
   cleanUp(done);
 });
@@ -36,9 +57,9 @@ describe("Department CRUD", () => {
       name: "Computer",
       acronym: "COMPS",
       yearOfStarting: "2020-09-01T00:00:00.000Z",
-      accreditations: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03a")],
-      infrastructures: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
-      organization: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
+      accreditations: [accreditationIds],
+      infrastructures: [infrastructureIds],
+      organization: [organizationIds],
     });
 
     expect(response.status).toBe(200);
@@ -52,9 +73,9 @@ describe("Department CRUD", () => {
         name: "Computer",
         acronym: "COMPS",
         yearOfStarting: "2020-09-01T00:00:00.000Z",
-        accreditations: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03a")],
-        infrastructures: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
-        organization: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
+        accreditations: [accreditationIds],
+        infrastructures: [infrastructureIds],
+        organization: [organizationIds],
       });
       id = JSON.parse(id.res.text).id;
     });
@@ -64,9 +85,9 @@ describe("Department CRUD", () => {
         name: "Computer",
         acronym: "COMPS",
         yearOfStarting: "2020-09-01T00:00:00.000Z",
-        accreditations: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03a")],
-        infrastructures: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
-        organization: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
+        accreditations: [accreditationIds],
+        infrastructures: [infrastructureIds],
+        organization: [organizationIds],
       });
     });
 
@@ -75,9 +96,9 @@ describe("Department CRUD", () => {
         name: "Computer",
         acronym: "COMPS",
         yearOfStarting: "2020-09-01T00:00:00.000Z",
-        accreditations: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03a")],
-        infrastructures: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
-        organization: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
+        accreditations: [accreditationIds],
+        infrastructures: [infrastructureIds],
+        organization: [organizationIds],
       });
       expect(response.body.res).not.toBeNull();
     });
@@ -87,9 +108,9 @@ describe("Department CRUD", () => {
         name: "Electronics",
         acronym: "COMPS",
         yearOfStarting: "2020-09-01T00:00:00.000Z",
-        accreditations: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03a")],
-        infrastructures: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
-        organization: [mongoose.Types.ObjectId("5f8778b54b553439ac49a03b")],
+        accreditations: [accreditationIds],
+        infrastructures: [infrastructureIds],
+        organization: [organizationIds],
       });
       expect(response.status).toBe(200);
       expect(response.body.res).toMatch(/department updated/);