diff --git a/server/src/common/errors/index.ts b/server/src/common/errors/index.ts
index b97fd8c..a81dbee 100644
--- a/server/src/common/errors/index.ts
+++ b/server/src/common/errors/index.ts
@@ -5,3 +5,35 @@ export class NotImplementedError extends Error {
     Object.setPrototypeOf(this, NotImplementedError.prototype);
   }
 }
+
+export class NotFoundError extends Error {
+  constructor(message: string = 'The requested resource was not found.') {
+    super(message);
+    this.name = 'NotFoundError';
+    Object.setPrototypeOf(this, NotFoundError.prototype);
+  }
+}
+
+export class BadRequestError extends Error {
+  constructor(message: string = 'Bad request.') {
+    super(message);
+    this.name = 'BadRequestError';
+    Object.setPrototypeOf(this, BadRequestError.prototype);
+  }
+}
+
+export class UnauthorizedError extends Error {
+  constructor(message: string = 'Unauthorized.') {
+    super(message);
+    this.name = 'UnauthorizedError';
+    Object.setPrototypeOf(this, UnauthorizedError.prototype);
+  }
+}
+
+export class ForbiddenError extends Error {
+  constructor(message: string = 'Forbidden.') {
+    super(message);
+    this.name = 'ForbiddenError';
+    Object.setPrototypeOf(this, ForbiddenError.prototype);
+  }
+}
diff --git a/server/src/common/mongoose-plugins.ts b/server/src/common/mongoose-plugins.ts
index 2845a65..d3d90c5 100644
--- a/server/src/common/mongoose-plugins.ts
+++ b/server/src/common/mongoose-plugins.ts
@@ -27,3 +27,8 @@ export const softDeletePlugin = (schema: mongoose.Schema) => {
     this.deletedBy = null;
   };
 };
+
+export type SoftDeleteMethods = {
+  softDelete(deletedBy: string | null): void;
+  restore(): void;
+};
diff --git a/server/src/middlewares/error-handler.ts b/server/src/middlewares/error-handler.ts
index 8c83c79..4309edd 100644
--- a/server/src/middlewares/error-handler.ts
+++ b/server/src/middlewares/error-handler.ts
@@ -28,6 +28,30 @@ export const errorHandler = (
     });
   }
 
+  if (err.name === 'BadRequestError') {
+    return res.status(400).json({
+      error: err.message,
+    });
+  }
+
+  if (err.name === 'NotFoundError') {
+    return res.status(404).json({
+      error: err.message,
+    });
+  }
+
+  if (err.name === 'UnauthorizedError') {
+    return res.status(401).json({
+      error: err.message,
+    });
+  }
+
+  if (err.name === 'ForbiddenError') {
+    return res.status(403).json({
+      error: err.message,
+    });
+  }
+
   // Handle mongodb cast errors
   if (err.name === 'CastError') {
     return res.status(400).json({
diff --git a/server/src/modules/user/controller.ts b/server/src/modules/user/controller.ts
index 3be9376..516f22c 100644
--- a/server/src/modules/user/controller.ts
+++ b/server/src/modules/user/controller.ts
@@ -27,19 +27,15 @@ export const updateUserById = async (req: Request, res: Response) => {
 };
 
 export const deleteUserById = async (req: Request, res: Response) => {
-  const deleteUser = await userService.deleteUserById(req.params.id);
+  await userService.deleteUser(req.params.id, req.user);
 
-  if (!deleteUser) return res.status(404).json({ message: 'User not found' });
   return res.status(200).json({ message: 'User delete successful' });
 };
 
 export const restoreUser = async (req: Request, res: Response) => {
-  const user = await userService.restoreUser(req.params.id);
+  await userService.restoreUser(req.params.id);
 
-  if (!user) return res.status(404).json({ message: 'No user found' });
-
-  return res.status(201).json({
-    user: user,
+  return res.status(200).json({
     message: 'User restored successful',
   });
 };
diff --git a/server/src/modules/user/model.ts b/server/src/modules/user/model.ts
index 593b93f..4f7e58d 100644
--- a/server/src/modules/user/model.ts
+++ b/server/src/modules/user/model.ts
@@ -1,7 +1,7 @@
 import mongoose from 'mongoose';
 
 import { User } from '@/types';
-import { softDeletePlugin } from '@/common/mongoose-plugins';
+import { SoftDeleteMethods, softDeletePlugin } from '@/common/mongoose-plugins';
 
 const userSchema = new mongoose.Schema(
   {
@@ -18,6 +18,6 @@ const userSchema = new mongoose.Schema(
 
 userSchema.plugin(softDeletePlugin);
 
-export type UserDocument = User & mongoose.Document;
+export type UserDocument = User & mongoose.Document & SoftDeleteMethods;
 
 export const UserModel = mongoose.model<UserDocument>('User', userSchema);
diff --git a/server/src/modules/user/service.ts b/server/src/modules/user/service.ts
index 14fa0c2..b56a67b 100644
--- a/server/src/modules/user/service.ts
+++ b/server/src/modules/user/service.ts
@@ -1,3 +1,4 @@
+import { Request } from 'express';
 import z from 'zod';
 import bcrypt from 'bcrypt';
 import type { QueryFilter } from 'mongoose';
@@ -7,6 +8,7 @@ import { envConfig } from '@/config';
 import { PageResult, UpdateUser, User } from '@/types';
 
 import { UserDocument, UserModel } from './model';
+import { ForbiddenError, NotFoundError } from '@/common/errors';
 
 export const getHashedPassword = async (password: string) =>
   bcrypt.hash(password, envConfig.BCRYPT_SALT_ROUNDS);
@@ -50,38 +52,31 @@ export const updateUserById = async (
   });
 };
 
-export const deleteUserById = async (_id: string) => {
+export const deleteUser = async (_id: string, reqUser: Request['user']) => {
   const user = await UserModel.findById(_id);
 
-  if (!user) return false;
+  if (!user) {
+    throw new NotFoundError('User not found');
+  }
 
-  return UserModel.findByIdAndUpdate(
-    _id,
-    {
-      deleted: true,
-      deletedAt: new Date().toISOString(),
-    },
-    {
-      new: true,
-    },
-  );
+  if (!reqUser) {
+    throw new ForbiddenError('Unauthorized');
+  }
+
+  await user.softDelete(reqUser?._id);
 };
 
 export const restoreUser = async (_id: string) => {
-  const user = await UserModel.findById(_id);
+  const user = await UserModel.findOne({
+    _id,
+    deleted: true,
+  });
 
-  if (!user) return false;
+  if (!user) {
+    throw new NotFoundError('User not found');
+  }
 
-  return UserModel.findByIdAndUpdate(
-    _id,
-    {
-      deleted: false,
-      deletedAt: null,
-    },
-    {
-      new: true,
-    },
-  );
+  await user.restore();
 };
 
 export const findUserByEmail = async (email: string) => {