diff --git a/src/main/java/com/petstore/controller/ReportLeadController.java b/src/main/java/com/petstore/controller/ReportLeadController.java
index 3034ae3..833eff0 100644
--- a/src/main/java/com/petstore/controller/ReportLeadController.java
+++ b/src/main/java/com/petstore/controller/ReportLeadController.java
@@ -54,6 +54,7 @@ public class ReportLeadController {
             data.put("remindDate", lead.getRemindDate() == null ? null : lead.getRemindDate().toString());
             data.put("unsubscribeToken", lead.getUnsubscribeToken());
             data.put("wechatBound", outcome.wechatBound());
+            data.put("repeatSubmit", outcome.repeatSubmit());
             return Map.of("code", 200, "data", data);
         } catch (IllegalArgumentException e) {
             return Map.of("code", 400, "message", e.getMessage());
diff --git a/src/main/java/com/petstore/service/ReportLeadService.java b/src/main/java/com/petstore/service/ReportLeadService.java
index 6067155..84800fd 100644
--- a/src/main/java/com/petstore/service/ReportLeadService.java
+++ b/src/main/java/com/petstore/service/ReportLeadService.java
@@ -31,8 +31,8 @@ public class ReportLeadService {
     private final UserService userService;
     private final WechatMiniProgramService wechatMiniProgramService;
 
-    /** 留资提交结果：记录 + 是否已将微信 openid 绑定到宠主账号（S3→S4） */
-    public record LeadSubmitOutcome(ReportLead lead, boolean wechatBound) {}
+    /** 留资提交结果：记录 + 是否已将微信 openid 绑定到宠主账号（S3→S4）+ 是否同报告同手机号再次提交（幂等更新） */
+    public record LeadSubmitOutcome(ReportLead lead, boolean wechatBound, boolean repeatSubmit) {}
 
     /** 当服务类型不在已配置表中时使用的兜底间隔（天） */
     private static final int FALLBACK_MIN = 28;
@@ -127,6 +127,7 @@ public class ReportLeadService {
 
         LocalDateTime now = LocalDateTime.now();
         ReportLead lead = reportLeadMapper.findFirstByReportIdAndPhone(report.getId(), phone).orElse(null);
+        boolean repeatSubmit = lead != null;
         if (lead == null) {
             lead = new ReportLead();
             lead.setReportId(report.getId());
@@ -180,7 +181,7 @@ public class ReportLeadService {
             }
         }
 
-        return new LeadSubmitOutcome(lead, wechatBound);
+        return new LeadSubmitOutcome(lead, wechatBound, repeatSubmit);
     }
 
     /** 退订：按 unsubscribeToken 找记录并置状态 */