diff --git a/app/Http/Controllers/ESign/EsignPublicController.php b/app/Http/Controllers/ESign/EsignPublicController.php
index edc355ba..4e3bcbe0 100644
--- a/app/Http/Controllers/ESign/EsignPublicController.php
+++ b/app/Http/Controllers/ESign/EsignPublicController.php
@@ -133,7 +133,7 @@ public function getContract(string $token): JsonResponse
                     'has_stamp' => (bool) $signer->signature_image_path,
                     'signed_at' => $signer->signed_at,
                 ],
-                'send_method' => $contract->send_method ?? 'email',
+                'send_method' => $contract->tenant_id == 1 ? 'email' : ($contract->send_method ?? 'email'),
                 'is_signable' => $isSignable,
                 'status_message' => $statusMessage,
             ],
@@ -166,8 +166,8 @@ public function sendOtp(string $token): JsonResponse
         $sendMethod = $contract->send_method ?? 'email';
         $channel = 'email';
 
-        // 알림톡/both 방식이고 전화번호가 있으면 SMS로 발송
-        if (in_array($sendMethod, ['alimtalk', 'both']) && $signer->phone) {
+        // 알림톡/both 방식이고 전화번호가 있으면 SMS로 발송 (본사 tenant_id=1은 이메일 유지)
+        if (in_array($sendMethod, ['alimtalk', 'both']) && $signer->phone && $contract->tenant_id != 1) {
             $smsSent = $this->sendOtpViaSms($contract, $signer, $otpCode);
             if ($smsSent) {
                 $channel = 'sms';