diff --git a/app/models/case_log.rb b/app/models/case_log.rb
index fa1c189f9..13290daa5 100644
--- a/app/models/case_log.rb
+++ b/app/models/case_log.rb
@@ -111,10 +111,9 @@ class CaseLog < ApplicationRecord
   enum property_relet: DbEnums.polar, _suffix: true
   enum armedforces: DbEnums.armed_forces, _suffix: true
   enum first_time_property_let_as_social_housing: DbEnums.polar, _suffix: true
-  enum do_you_know_the_postcode: DbEnums.polar, _suffix: true
-  enum do_you_know_the_local_authority: DbEnums.polar, _suffix: true
 
   AUTOGENERATED_FIELDS = %w[id status created_at updated_at discarded_at].freeze
+  OPTIONAL_FIELDS = %w[do_you_know_the_postcode do_you_know_the_local_authority].freeze
 
   def self.editable_fields
     attribute_names - AUTOGENERATED_FIELDS
@@ -224,7 +223,7 @@ private
   end
 
   def mandatory_fields
-    required = attributes.except(*AUTOGENERATED_FIELDS)
+    required = attributes.except(*(AUTOGENERATED_FIELDS + OPTIONAL_FIELDS))
 
     dynamically_not_required = []
 
diff --git a/spec/fixtures/complete_case_log.json b/spec/fixtures/complete_case_log.json
index 8274e5bb0..2345097dc 100644
--- a/spec/fixtures/complete_case_log.json
+++ b/spec/fixtures/complete_case_log.json
@@ -138,8 +138,6 @@
     "postcod2": "w3",
     "ppostc1": "w3",
     "ppostc2": "w3",
-    "do_you_know_the_postcode": "Yes",
-    "do_you_know_the_local_authority": "Yes",
     "why_dont_you_know_la": "Forgot",
     "first_time_property_let_as_social_housing": "Yes",
     "type_property_most_recently_let_as": "Affordable rent basis",