diff --git a/app/Controllers/Admin/Customer/ClientController.php b/app/Controllers/Admin/Customer/ClientController.php
index 5353318..5e2e1ee 100644
--- a/app/Controllers/Admin/Customer/ClientController.php
+++ b/app/Controllers/Admin/Customer/ClientController.php
@@ -60,7 +60,7 @@ class ClientController extends CustomerController
             if (!$history) {
                 throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생: 비고가 정의되지 않았습니다.");
             }
-            $entity = $this->service->modify($uid, ['history' => $history]);
+            $entity = $this->service->history($uid, $history);
             $this->addViewDatas('entity', $entity);
             return $this->action_redirect_process('info', static::class . '->' . __FUNCTION__ . "에서 {$this->getTitle()} 비고설정이 완료되었습니다.");
         } catch (\Throwable $e) {
diff --git a/app/Controllers/Admin/Customer/ServiceController.php b/app/Controllers/Admin/Customer/ServiceController.php
index 2c422ad..0e86783 100644
--- a/app/Controllers/Admin/Customer/ServiceController.php
+++ b/app/Controllers/Admin/Customer/ServiceController.php
@@ -51,7 +51,7 @@ class ServiceController extends CustomerController
       if (!$history) {
         throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생: 비고가 정의되지 않았습니다.");
       }
-      $entity = $this->service->modify($uid, ['history' => $history]);
+      $entity = $this->service->history($uid, $history);
       $this->addViewDatas('entity', $entity);
       return $this->action_redirect_process('info', static::class . '->' . __FUNCTION__ . "에서 {$this->getTitle()} 비고설정이 완료되었습니다.");
     } catch (\Throwable $e) {
diff --git a/app/Services/Customer/ClientService.php b/app/Services/Customer/ClientService.php
index 90f750c..38c9c36 100644
--- a/app/Services/Customer/ClientService.php
+++ b/app/Services/Customer/ClientService.php
@@ -2,13 +2,14 @@
 
 namespace App\Services\Customer;
 
-use App\DTOs\Customer\ClientDTO;
-use App\Entities\Customer\ClientEntity;
-use App\Entities\PaymentEntity;
-use App\Forms\Customer\ClientForm;
-use App\Helpers\Customer\ClientHelper;
-use App\Models\Customer\ClientModel;
 use RuntimeException;
+use App\Entities\CommonEntity;
+use App\Entities\PaymentEntity;
+use App\DTOs\Customer\ClientDTO;
+use App\Forms\Customer\ClientForm;
+use App\Models\Customer\ClientModel;
+use App\Helpers\Customer\ClientHelper;
+use App\Entities\Customer\ClientEntity;
 
 class ClientService extends CustomerService
 {
@@ -69,4 +70,21 @@ class ClientService extends CustomerService
         return $formDatas;
     }
 
+    public function history(string|int $uid, string $history): CommonEntity
+    {
+        return $this->dbTransaction(function () use ($uid, $history) {
+            $entity = $this->getEntity($uid);
+            if (!$entity) {
+                throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생: {$uid}에 해당하는 정보을 찾을수 없습니다.");
+            }
+            $formDatas['user_uid'] = (int) $this->getAuthContext()->getUID();
+            $formDatas['history'] = $history;
+            // 검증 통과 후 엔티티 반영
+            $entity->fill($formDatas);
+            if (!$entity->hasChanged()) {
+                return $entity;
+            }
+            return $this->save_process($entity);
+        }, __FUNCTION__);
+    }
 }
diff --git a/app/Services/Customer/ServiceService.php b/app/Services/Customer/ServiceService.php
index 06b62e4..de69575 100644
--- a/app/Services/Customer/ServiceService.php
+++ b/app/Services/Customer/ServiceService.php
@@ -2,14 +2,15 @@
 
 namespace App\Services\Customer;
 
-use App\DTOs\Customer\ServiceDTO;
-use App\Entities\Customer\ServiceEntity;
-use App\Forms\Customer\ServiceForm;
-use App\Helpers\Customer\ServiceHelper;
-use App\Models\Customer\ServiceModel;
-use DateTimeImmutable;
 use DateTimeZone;
 use RuntimeException;
+use DateTimeImmutable;
+use App\Entities\CommonEntity;
+use App\DTOs\Customer\ServiceDTO;
+use App\Forms\Customer\ServiceForm;
+use App\Models\Customer\ServiceModel;
+use App\Helpers\Customer\ServiceHelper;
+use App\Entities\Customer\ServiceEntity;
 
 class ServiceService extends CustomerService
 {
@@ -189,4 +190,22 @@ class ServiceService extends CustomerService
 
         return $this->recalcAmountAndSyncPaymentByOld($oldEntity, $entity);
     }
+
+    public function history(string|int $uid, string $history): CommonEntity
+    {
+        return $this->dbTransaction(function () use ($uid, $history) {
+            $entity = $this->getEntity($uid);
+            if (!$entity) {
+                throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생: {$uid}에 해당하는 정보을 찾을수 없습니다.");
+            }
+            $formDatas['user_uid'] = (int) $this->getAuthContext()->getUID();
+            $formDatas['history'] = $history;
+            // 검증 통과 후 엔티티 반영
+            $entity->fill($formDatas);
+            if (!$entity->hasChanged()) {
+                return $entity;
+            }
+            return $this->save_process($entity);
+        }, __FUNCTION__);
+    }
 }