diff --git a/IRaCIS.Core.Application/Service/SiteSurvey/TrialSiteSurveyService.cs b/IRaCIS.Core.Application/Service/SiteSurvey/TrialSiteSurveyService.cs
index fd8f853da..4d27ac9aa 100644
--- a/IRaCIS.Core.Application/Service/SiteSurvey/TrialSiteSurveyService.cs
+++ b/IRaCIS.Core.Application/Service/SiteSurvey/TrialSiteSurveyService.cs
@@ -920,7 +920,7 @@ namespace IRaCIS.Core.Application.Contracts
 
             var trialType = _trialRepository.Where(t => t.Id == trialId).Select(t => t.TrialType).FirstOrDefault();
 
-            foreach (var item in needGenerateList.GroupBy(t => t.Email))
+            foreach (var item in needSendEmailList.GroupBy(t => t.Email))
             {
                 var addUserRoleList = item.ToList();