diff --git a/app/models/validations/sales/property_validations.rb b/app/models/validations/sales/property_validations.rb
index c7a368a0e..3a8f6a463 100644
--- a/app/models/validations/sales/property_validations.rb
+++ b/app/models/validations/sales/property_validations.rb
@@ -6,6 +6,7 @@ module Validations::Sales::PropertyValidations
       record.errors.add :postcode_full, I18n.t("validations.property.postcode.must_match_previous")
       record.errors.add :ppostcode_full, I18n.t("validations.property.postcode.must_match_previous")
       record.errors.add :ownershipsch, I18n.t("validations.property.postcode.must_match_previous")
+      record.errors.add :uprn, I18n.t("validations.property.postcode.must_match_previous")
     end
   end