diff --git a/apps/em/serializers.py b/apps/em/serializers.py
index 8e2bd800..74ace2a3 100644
--- a/apps/em/serializers.py
+++ b/apps/em/serializers.py
@@ -19,6 +19,7 @@ class EcheckRecordSerializer(CustomModelSerializer):
     class Meta:
         model = EcheckRecord
         fields = '__all__'
+        read_only_fields = EXCLUDE_FIELDS
 
     def validate(self, attrs):
         attrs = super().validate(attrs)