diff --git a/IRaCIS.Core.Application/Service/Document/TrialEmailNoticeConfigService.cs b/IRaCIS.Core.Application/Service/Document/TrialEmailNoticeConfigService.cs
index 3b7b7b78a..26c7ac389 100644
--- a/IRaCIS.Core.Application/Service/Document/TrialEmailNoticeConfigService.cs
+++ b/IRaCIS.Core.Application/Service/Document/TrialEmailNoticeConfigService.cs
@@ -794,7 +794,7 @@ namespace IRaCIS.Core.Application.Service
                 ["SubjectCode"] = taskInfo.SubjectCode,
                 ["VisitName"] = taskInfo.SourceSubjectVisitId != null ? taskInfo.VisitName : taskInfo.ModuleVisitName,
                 ["EarliestScanDate"] = taskInfo.SourceSubjectVisitId != null ? taskInfo.VisitEarliestScanDate?.ToString("yyyy-MM-dd") : taskInfo.ModuleEarliestScanDate?.ToString("yyyy-MM-dd"),
-                ["SignTime"] = taskInfo.SignTime,
+                ["SignTime"] = taskInfo.SignTime?.ToString("yyyy-MM-dd"),
                 ["Result"] = answer
 
             };
diff --git a/IRaCIS.Core.Domain/Reading/ReadingCriterionQuestion/ReadingQuestionTrial.cs b/IRaCIS.Core.Domain/Reading/ReadingCriterionQuestion/ReadingQuestionTrial.cs
index aaf7986bd..4bb999a83 100644
--- a/IRaCIS.Core.Domain/Reading/ReadingCriterionQuestion/ReadingQuestionTrial.cs
+++ b/IRaCIS.Core.Domain/Reading/ReadingCriterionQuestion/ReadingQuestionTrial.cs
@@ -261,8 +261,8 @@ namespace IRaCIS.Core.Domain.Models
 		[ForeignKey("ReadingQuestionCriterionTrialId")]
 		public ReadingQuestionCriterionTrial ReadingQuestionCriterionTrial { get; set; }
 
-
-		public List<ReadingTableQuestionTrial> ReadingTableQuestionTrialList { get; set; }
+        [JsonIgnore]
+        public List<ReadingTableQuestionTrial> ReadingTableQuestionTrialList { get; set; }
 
       
 		[NotMapped]