diff --git a/app/Services/NaverService.php b/app/Services/NaverService.php
index d87df99..e8349a8 100644
--- a/app/Services/NaverService.php
+++ b/app/Services/NaverService.php
@@ -503,7 +503,7 @@ class NaverService
             'vrfc_type_sub' => ($rawData['verificationTypeCode'] === 'D') ? ($ownerCheckYn === 'Y' ? 'D2' : 'D1') : ($rawData['verificationTypeCode'] === 'N' ? 'N2' : $rawData['verificationTypeCode'] . '1'),
             'cert_register_save_yn' => 'N',
             'confirm_doc_img_url_save_yn' => 'N',
-            'address4' => $address['etcAddress'],
+            'address4' => $address['etcAddress'] ?? null,
             'reference_file_url' => !empty($referenceFileUrl) ? implode('|', $referenceFileUrl) : '',
             'reference_file_url_save_yn' => !empty($referenceFileUrl) ? 'Y' : 'N',
             'registerBookUniqueNo'  => $rawData['verificationReference'] ?? null,