diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index 7f95fbbab..9a189f517 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -223,6 +223,11 @@ class Procedure < ApplicationRecord
     accepte:         'accepte'
   }
 
+  enum closing_reason: {
+    internal_procedure: 'internal_procedure',
+    other: 'other'
+  }
+
   scope :for_api_v2, -> {
     includes(:draft_revision, :published_revision, administrateurs: :user)
   }
@@ -260,6 +265,9 @@ class Procedure < ApplicationRecord
 
   validate :check_juridique, on: [:create, :publication]
 
+  # TO DO add validation after data backfill
+  # validates :replaced_by_id, presence: true, if: -> { closing_reason == self.closing_reasons.fetch(:internal_procedure) }
+
   validates :path, presence: true, format: { with: /\A[a-z0-9_\-]{3,200}\z/ }, uniqueness: { scope: [:path, :closed_at, :hidden_at, :unpublished_at], case_sensitive: false }
   validates :duree_conservation_dossiers_dans_ds, allow_nil: false,
                                                   numericality: {
diff --git a/db/migrate/20240201141520_add_closing_reason_and_closing_details.rb b/db/migrate/20240201141520_add_closing_reason_and_closing_details.rb
new file mode 100644
index 000000000..48bf33f3b
--- /dev/null
+++ b/db/migrate/20240201141520_add_closing_reason_and_closing_details.rb
@@ -0,0 +1,6 @@
+class AddClosingReasonAndClosingDetails < ActiveRecord::Migration[7.0]
+  def change
+    add_column :procedures, :closing_reason, :string
+    add_column :procedures, :closing_details, :string
+  end
+end
diff --git a/spec/models/procedure_spec.rb b/spec/models/procedure_spec.rb
index c1aedbd90..62f553e1e 100644
--- a/spec/models/procedure_spec.rb
+++ b/spec/models/procedure_spec.rb
@@ -178,6 +178,20 @@ describe Procedure do
       it { is_expected.to allow_value('Demande de subvention').for(:libelle) }
     end
 
+    context 'closing procedure' do
+      context 'without replacing procedure in DS' do
+        let(:procedure) { create(:procedure) }
+
+        context 'valid' do
+          before do
+            procedure.update!(closing_details: "Bonjour,\nLa démarche est désormais hébergée sur une autre plateforme\nCordialement", closing_reason: Procedure.closing_reasons.fetch(:other))
+          end
+
+          it { expect(procedure).to be_valid }
+        end
+      end
+    end
+
     context 'description' do
       it { is_expected.not_to allow_value(nil).for(:description) }
       it { is_expected.not_to allow_value('').for(:description) }