diff --git a/app/models/sales_log.rb b/app/models/sales_log.rb
index ca83a9cf0..c1bea2a48 100644
--- a/app/models/sales_log.rb
+++ b/app/models/sales_log.rb
@@ -42,7 +42,7 @@ class SalesLog < Log
   }
   scope :filter_by_organisation, ->(org, _user = nil) { where(owning_organisation: org) }
 
-  OPTIONAL_FIELDS = %w[saledate_check purchid monthly_charges_value_check old_persons_shared_ownership_value_check].freeze
+  OPTIONAL_FIELDS = %w[saledate_check purchid monthly_charges_value_check old_persons_shared_ownership_value_check mortgagelender othtype].freeze
   RETIREMENT_AGES = { "M" => 65, "F" => 60, "X" => 65 }.freeze
 
   def lettings?
diff --git a/spec/models/sales_log_spec.rb b/spec/models/sales_log_spec.rb
index a6fc002d5..649c2fae7 100644
--- a/spec/models/sales_log_spec.rb
+++ b/spec/models/sales_log_spec.rb
@@ -59,6 +59,8 @@ RSpec.describe SalesLog, type: :model do
           purchid
           monthly_charges_value_check
           old_persons_shared_ownership_value_check
+          mortgagelender
+          othtype
           proplen
           mortlen
         ])
@@ -74,6 +76,8 @@ RSpec.describe SalesLog, type: :model do
           purchid
           monthly_charges_value_check
           old_persons_shared_ownership_value_check
+          mortgagelender
+          othtype
           address_line2
           county
           postcode_full