diff --git a/app/Http/Controllers/ESign/EsignPublicController.php b/app/Http/Controllers/ESign/EsignPublicController.php
index 877f8ac8..9eab588a 100644
--- a/app/Http/Controllers/ESign/EsignPublicController.php
+++ b/app/Http/Controllers/ESign/EsignPublicController.php
@@ -167,8 +167,8 @@ public function sendOtp(string $token): JsonResponse
         $sendMethod = $contract->send_method ?? 'email';
         $channel = 'email';
 
-        // 알림톡/both 방식이고 전화번호가 있으면 SMS로 발송 (본사 tenant_id=1은 이메일 유지)
-        if (in_array($sendMethod, ['alimtalk', 'both']) && $signer->phone && $contract->tenant_id != 1) {
+        // 알림톡/both 방식이고 전화번호가 있으면 SMS로 발송 (상대방만 SMS, 본사(creator)는 이메일 유지)
+        if (in_array($sendMethod, ['alimtalk', 'both']) && $signer->phone && $signer->role === EsignSigner::ROLE_COUNTERPART) {
             $smsSent = $this->sendOtpViaSms($contract, $signer, $otpCode);
             if ($smsSent) {
                 $channel = 'sms';