diff --git a/app/models/validations/financial_validations.rb b/app/models/validations/financial_validations.rb
index 0956c9224..cb25439c8 100644
--- a/app/models/validations/financial_validations.rb
+++ b/app/models/validations/financial_validations.rb
@@ -192,6 +192,7 @@ private
         record.errors.add :brent, I18n.t("validations.financial.brent.below_hard_min")
         record.errors.add :beds, I18n.t("validations.financial.brent.beds.below_hard_min")
         record.errors.add :la, I18n.t("validations.financial.brent.la.below_hard_min")
+        record.errors.add :postcode_known, I18n.t("validations.financial.brent.postcode_known.below_hard_min")
         record.errors.add :rent_type, I18n.t("validations.financial.brent.rent_type.below_hard_min")
         record.errors.add :needstype, I18n.t("validations.financial.brent.needstype.below_hard_min")
         record.errors.add :period, I18n.t("validations.financial.brent.period.below_hard_min")
@@ -199,6 +200,7 @@ private
         record.errors.add :brent, I18n.t("validations.financial.brent.above_hard_max")
         record.errors.add :beds, I18n.t("validations.financial.brent.beds.above_hard_max")
         record.errors.add :la, I18n.t("validations.financial.brent.la.above_hard_max")
+        record.errors.add :postcode_known, I18n.t("validations.financial.brent.postcode_known.above_hard_max")
         record.errors.add :rent_type, I18n.t("validations.financial.brent.rent_type.above_hard_max")
         record.errors.add :needstype, I18n.t("validations.financial.brent.needstype.above_hard_max")
         record.errors.add :period, I18n.t("validations.financial.brent.period.above_hard_max")
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 853fabcb2..3a2dc49e4 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -190,6 +190,9 @@ en:
       brent:
         below_hard_min: "Rent is below the absolute minimum expected for a property of this type. Please check the rent, rent period, local authority and (if general needs) number of bedrooms"
         above_hard_max: "Rent is higher than the absolute maximum expected for a property of this type. Please check the rent, rent period, local authority and (if general needs) number of bedrooms"
+        postcode_known:
+          below_hard_min: "Rent is below the absolute minimum expected for a property of this type. Please check the rent, rent period, local authority and number of bedrooms"
+          above_hard_max: "Rent is higher than the absolute maximum expected for a property of this type. Please check the rent, rent period, local authority and number of bedrooms"
         la:
           below_hard_min: "Rent is below the absolute minimum expected for a property of this type based on this local authority"
           above_hard_max: "Rent is higher than the absolute maximum expected for a property of this type based on this local authority"