diff --git a/backend/services/nhn_alimtalk.py b/backend/services/nhn_alimtalk.py
index f3af174..0b1db20 100644
--- a/backend/services/nhn_alimtalk.py
+++ b/backend/services/nhn_alimtalk.py
@@ -100,15 +100,25 @@ def _send_alimtalk(template_code, recipient_no, template_params):
 
 
 def build_item_summary(items):
-    """구매 품목 요약 문자열 생성 (예: '타이레놀 외 3건')"""
+    """구매 품목 요약 문자열 생성 (예: '타이레놀 외 3건')
+    
+    Note: 카카오 알림톡 템플릿 변수는 14자 제한
+          (에러: "Blacklist can't use more than 14 characters in template value.")
+          특수문자(%, 괄호 등)는 문제없이 발송 가능!
+    """
     if not items:
         return "약국 구매"
     first = items[0]['name']
-    if len(first) > 20:
-        first = first[:18] + '..'
+    first = first.strip()
+    
     if len(items) == 1:
-        return first
-    return f"{first} 외 {len(items) - 1}건"
+        # 단일 품목: 14자 제한 (그냥 자름)
+        return first[:14]
+    
+    # 복수 품목: "외 N건" 붙으므로 전체 14자 맞춤
+    suffix = f" 외 {len(items) - 1}건"
+    max_first = 14 - len(suffix)
+    return f"{first[:max_first]}{suffix}"
 
 
 def send_mileage_claim_alimtalk(phone, name, points, balance, items=None,
@@ -146,24 +156,7 @@ def send_mileage_claim_alimtalk(phone, name, points, balance, items=None,
 
     success, msg = _send_alimtalk(template_code, phone, params)
 
-    if not success:
-        # V3 실패 로그
-        _log_to_db(template_code, phone, False, msg,
-                   template_params=params, user_id=user_id,
-                   trigger_source=trigger_source, transaction_id=transaction_id)
-
-        # V2 폴백
-        template_code = 'MILEAGE_CLAIM_V2'
-        params = {
-            '고객명': name,
-            '적립포인트': f'{points:,}',
-            '총잔액': f'{balance:,}',
-            '적립일시': now_kst,
-            '전화번호': phone
-        }
-        success, msg = _send_alimtalk(template_code, phone, params)
-
-    # 최종 결과 로그
+    # 결과 로그 (V3만 사용, V2 폴백 제거 - V2 반려 상태)
     _log_to_db(template_code, phone, success, msg,
                template_params=params, user_id=user_id,
                trigger_source=trigger_source, transaction_id=transaction_id)