diff --git a/src/main/java/go/kr/project/carInspectionPenalty/registration/service/impl/checker/OwnerCloseWithin31Checker.java b/src/main/java/go/kr/project/carInspectionPenalty/registration/service/impl/checker/OwnerCloseWithin31Checker.java
index e5cd8ef..250630c 100644
--- a/src/main/java/go/kr/project/carInspectionPenalty/registration/service/impl/checker/OwnerCloseWithin31Checker.java
+++ b/src/main/java/go/kr/project/carInspectionPenalty/registration/service/impl/checker/OwnerCloseWithin31Checker.java
@@ -58,6 +58,7 @@ public class OwnerCloseWithin31Checker extends AbstractComparisonChecker {
             NewBasicResponse.Record step1Record = step1Response.getRecord().get(0);
             String vin = step1Record.getVin();  // 차대번호
             String step1OwnerName = step1Record.getRprsOwnrNm();  // 검사일 기준 소유자명
+            String step1RprsvOwnrIdecno = step1Record.getRprsvOwnrIdecno(); // 검사일 기준 대표소유자 회원번호
 
             log.info("[내사종결-명의이전] Step 1 결과 - 차대번호: {}, 소유자명: {}", vin, step1OwnerName);
 
@@ -164,25 +165,23 @@ public class OwnerCloseWithin31Checker extends AbstractComparisonChecker {
 
             // ========== Step 4: 자동차기본정보 조회 (차대번호, 부과일자=CHG_YMD -1일) ==========
             LocalDate targetDate = DateUtil.parseDate(targetChgYmd);
-            String targetChgYmdMinus1 = targetDate.minusDays(1).format(DATE_FORMATTER);
-            log.info("[내사종결-명의이전] Step 4: 자동차기본정보 조회 - 차대번호: {}, 부과일자: {} (원본: {})", vin, targetChgYmdMinus1, targetChgYmd);
-
-            NewBasicRequest step4Request = createBasicRequest(null, vin, targetChgYmdMinus1);
+            NewBasicRequest step4Request = createBasicRequest(null, vin, targetDate.format(DATE_FORMATTER));
             NewBasicResponse step4Response = apiService.getBasicInfo(step4Request);
             bassMatterLogService.updateCarFfnlgTrgtIdByTxIdNewTx(step4Response, existingData.getCarFfnlgTrgtId());
 
             if (step4Response == null || step4Response.getRecord() == null || step4Response.getRecord().isEmpty()) {
-                log.warn("[내사종결-명의이전] Step 4 응답 없음 - 차대번호: {}, 부과일자: {}", vin, targetChgYmdMinus1);
+                log.warn("[내사종결-명의이전] Step 4 응답 없음 - 차대번호: {}, 부과일자: {}", vin, targetDate.format(DATE_FORMATTER));
                 return null;
             }
 
             NewBasicResponse.Record step4Record = step4Response.getRecord().get(0);
             String step4OwnerName = step4Record.getRprsOwnrNm();  // CHG_YMD 시점의 소유자명
+            String step4RprsvOwnrIdecno = step4Record.getRprsvOwnrIdecno(); // 대표소유자 회원번호
 
             log.info("[내사종결-명의이전] Step 4 결과 - 소유자명: {}", step4OwnerName);
 
             // 명의이전 전 소유자가 상품용 아님
-            if (step4OwnerName == null || step4OwnerName.contains("상품용")) {
+            if (step4OwnerName == null || step4RprsvOwnrIdecno.contains(step1RprsvOwnrIdecno)) {
                 log.debug("[내사종결-명의이전] 명의이전 전 소유자가 상품용 - Step4 소유자명: {}", step4OwnerName);
                 return null;
             }