diff --git a/app/models/validations/sales/setup_validations.rb b/app/models/validations/sales/setup_validations.rb
index 193a41936..bb99f02ed 100644
--- a/app/models/validations/sales/setup_validations.rb
+++ b/app/models/validations/sales/setup_validations.rb
@@ -46,12 +46,12 @@ module Validations::Sales::SetupValidations
 
     if record.owning_organisation.present?
       if record.owning_organisation&.merge_date.present? && record.owning_organisation.merge_date <= record.saledate
-        record.errors.add :owning_organisation_id, I18n.t("validations.setup.owning_organisation.inactive_merged_organisation",
+        record.errors.add :owning_organisation_id, I18n.t("validations.setup.owning_organisation.inactive_merged_organisation_sales",
                                                           owning_organisation: record.owning_organisation.name,
                                                           owning_organisation_merge_date: record.owning_organisation.merge_date.to_formatted_s(:govuk_date),
                                                           owning_absorbing_organisation: record.owning_organisation.absorbing_organisation.name)
       elsif record.owning_organisation&.absorbed_organisations.present? && record.owning_organisation.created_at.to_date > record.saledate.to_date
-        record.errors.add :owning_organisation_id, I18n.t("validations.setup.owning_organisation.inactive_absorbing_organisation",
+        record.errors.add :owning_organisation_id, I18n.t("validations.setup.owning_organisation.inactive_absorbing_organisation_sales",
                                                           owning_organisation: record.owning_organisation.name,
                                                           owning_organisation_available_from: record.owning_organisation.created_at.to_formatted_s(:govuk_date))
       end
diff --git a/config/locales/en.yml b/config/locales/en.yml
index df747ae2f..7ad173de8 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -290,6 +290,8 @@ en:
         data_sharing_agreement_not_signed: "The organisation must accept the Data Sharing Agreement before it can be selected as the owning organisation."
         inactive_merged_organisation: "The owning organisation must be active on the tenancy start date. %{owning_organisation} became inactive on %{owning_organisation_merge_date} and was replaced by %{owning_absorbing_organisation}."
         inactive_absorbing_organisation: "The owning organisation must be active on the tenancy start date. %{owning_organisation} became active on %{owning_organisation_available_from}."
+        inactive_merged_organisation_sales: "The owning organisation must be active on the sale completion date. %{owning_organisation} became inactive on %{owning_organisation_merge_date} and was replaced by %{owning_absorbing_organisation}."
+        inactive_absorbing_organisation_sales: "The owning organisation must be active on the sale completion date. %{owning_organisation} became active on %{owning_organisation_available_from}."
       managing_organisation:
         invalid: "Please select the owning organisation or managing organisation that you belong to"
         data_sharing_agreement_not_signed: "The organisation must accept the Data Sharing Agreement before it can be selected as the managing organisation."
diff --git a/spec/models/validations/sales/setup_validations_spec.rb b/spec/models/validations/sales/setup_validations_spec.rb
index b21e8970b..f7f01eaf7 100644
--- a/spec/models/validations/sales/setup_validations_spec.rb
+++ b/spec/models/validations/sales/setup_validations_spec.rb
@@ -253,7 +253,7 @@ RSpec.describe Validations::Sales::SetupValidations do
           record.saledate = Time.zone.local(2023, 3, 1)
           record.owning_organisation_id = merged_organisation.id
           setup_validator.validate_organisation(record)
-          expect(record.errors["owning_organisation_id"]).to include(match "The owning organisation must be active on the tenancy start date. Merged org became inactive on 2 February 2023 and was replaced by Absorbing org.")
+          expect(record.errors["owning_organisation_id"]).to include(match "The owning organisation must be active on the sale completion date. Merged org became inactive on 2 February 2023 and was replaced by Absorbing org.")
         end
 
         it "allows organisation before it has been merged" do
@@ -269,7 +269,7 @@ RSpec.describe Validations::Sales::SetupValidations do
           record.saledate = Time.zone.local(2023, 1, 1)
           record.owning_organisation_id = absorbing_organisation.id
           setup_validator.validate_organisation(record)
-          expect(record.errors["owning_organisation_id"]).to include(match "The owning organisation must be active on the tenancy start date. Absorbing org became active on 1 February 2023.")
+          expect(record.errors["owning_organisation_id"]).to include(match "The owning organisation must be active on the sale completion date. Absorbing org became active on 1 February 2023.")
         end
 
         it "allows absorbing organisation after it has been created" do