diff --git a/app/models/organisation_relationship.rb b/app/models/organisation_relationship.rb
index e03b52530..7f3a85cae 100644
--- a/app/models/organisation_relationship.rb
+++ b/app/models/organisation_relationship.rb
@@ -1,17 +1,17 @@
 class OrganisationRelationship < ApplicationRecord
   belongs_to :child_organisation, class_name: "Organisation"
   belongs_to :parent_organisation, class_name: "Organisation"
-  validates :parent_organisation_id, presence: { message: "You must choose a housing provider" }
-  validates :child_organisation_id, presence: { message: "You must choose a managing agent" }
-  validates :parent_organisation_id, uniqueness: { scope: :child_organisation_id, message: "You have already added this housing provider" }
-  validates :child_organisation_id, uniqueness: { scope: :parent_organisation_id, message: "You have already added this managing agent" }
+  validates :parent_organisation_id, presence: { message: I18n.t("validations.organisation.housing_provider.blank") }
+  validates :child_organisation_id, presence: { message: I18n.t("validations.organisation.managing_agent.blank") }
+  validates :parent_organisation_id, uniqueness: { scope: :child_organisation_id, message: I18n.t("validations.organisation.housing_provider.already_added") }
+  validates :child_organisation_id, uniqueness: { scope: :parent_organisation_id, message: I18n.t("validations.organisation.managing_agent.already_added") }
   validate :validate_housing_provider_owns_stock, on: :housing_provider
 
 private
 
   def validate_housing_provider_owns_stock
     if parent_organisation_id.present? && !parent_organisation.holds_own_stock
-      errors.add :parent_organisation_id, I18n.t("validations.scheme.owning_organisation.does_not_own_stock")
+      errors.add :parent_organisation_id, I18n.t("validations.organisation.housing_provider.does_not_own_stock")
     end
   end
 end
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 4f6f6c5b5..ee3ad6b25 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -116,6 +116,13 @@ en:
     organisation:
       name_missing: "Enter the name of the organisation"
       provider_type_missing: "Select the organisation type"
+      housing_provider:
+        blank: "You must choose a housing provider"
+        already_added: "You have already added this housing provider"
+        does_not_own_stock: "Enter an organisation that owns housing stock"
+      managing_agent:
+        blank: "You must choose a managing agent"
+        already_added: "You have already added this managing agent"
     not_answered: "You must answer %{question}"
 
     other_field_missing: "If %{main_field_label} is other then %{other_field_label} must be provided"