diff --git a/Gemfile b/Gemfile
index db2a7c5fd..044088d47 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,6 +23,7 @@ gem 'delayed_job_active_record'
 gem 'delayed_job_web'
 gem 'devise' # Gestion des comptes utilisateurs
 gem 'devise-async'
+gem 'discard'
 gem 'dotenv-rails', require: 'dotenv/rails-now' # dotenv should always be loaded before rails
 gem 'flipper'
 gem 'flipper-active_record'
diff --git a/Gemfile.lock b/Gemfile.lock
index e72a25cae..13f80a794 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -187,6 +187,8 @@ GEM
       activejob (>= 5.0)
       devise (>= 4.0)
     diff-lcs (1.3)
+    discard (1.1.0)
+      activerecord (>= 4.2, < 7)
     domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
     dotenv (2.5.0)
@@ -737,6 +739,7 @@ DEPENDENCIES
   delayed_job_web
   devise
   devise-async
+  discard
   dotenv-rails
   factory_bot
   flipper
diff --git a/app/controllers/manager/procedures_controller.rb b/app/controllers/manager/procedures_controller.rb
index bd20a3061..0d05bed76 100644
--- a/app/controllers/manager/procedures_controller.rb
+++ b/app/controllers/manager/procedures_controller.rb
@@ -9,10 +9,10 @@ module Manager
     def scoped_resource
       if unfiltered_list?
         # Don't display deleted dossiers in the unfiltered list…
-        Procedure
+        Procedure.kept
       else
         # … but allow them to be searched and displayed.
-        Procedure.with_hidden
+        Procedure.with_discarded
       end
     end
 
diff --git a/app/models/dossier.rb b/app/models/dossier.rb
index 83de9b532..a03338b4e 100644
--- a/app/models/dossier.rb
+++ b/app/models/dossier.rb
@@ -2,6 +2,10 @@ class Dossier < ApplicationRecord
   self.ignored_columns = ['json_latlngs']
   include DossierFilteringConcern
 
+  include Discard::Model
+  self.discard_column = :hidden_at
+  default_scope -> { kept }
+
   enum state: {
     brouillon:       'brouillon',
     en_construction: 'en_construction',
@@ -94,9 +98,6 @@ class Dossier < ApplicationRecord
     end
   end
 
-  default_scope { where(hidden_at: nil) }
-  scope :hidden,                               -> { unscope(where: :hidden_at).where.not(hidden_at: nil) }
-  scope :with_hidden,                          -> { unscope(where: :hidden_at) }
   scope :state_brouillon,                      -> { where(state: states.fetch(:brouillon)) }
   scope :state_not_brouillon,                  -> { where.not(state: states.fetch(:brouillon)) }
   scope :state_en_construction,                -> { where(state: states.fetch(:en_construction)) }
@@ -378,7 +379,7 @@ class Dossier < ApplicationRecord
 
   def delete_and_keep_track(author)
     deleted_dossier = DeletedDossier.create_from_dossier(self)
-    update(hidden_at: deleted_dossier.deleted_at)
+    discard!
 
     if en_construction?
       administration_emails = followers_instructeurs.present? ? followers_instructeurs.map(&:email) : procedure.administrateurs.map(&:email)
diff --git a/app/models/invite.rb b/app/models/invite.rb
index 887a2ad0c..a09d62bac 100644
--- a/app/models/invite.rb
+++ b/app/models/invite.rb
@@ -16,5 +16,7 @@ class Invite < ApplicationRecord
   # and Dossier from their respective `default_scope`s.
   # Therefore, we also remove `Invite`s for such effectively deleted `Dossier`s
   # from their default scope.
-  default_scope { joins(:dossier).where(dossiers: { hidden_at: nil }) }
+  scope :kept, -> { joins(:dossier).merge(Dossier.kept) }
+
+  default_scope { kept }
 end
diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index 18a9ea4c2..081de7cc9 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -5,6 +5,10 @@ class Procedure < ApplicationRecord
 
   include ProcedureStatsConcern
 
+  include Discard::Model
+  self.discard_column = :hidden_at
+  default_scope -> { kept }
+
   MAX_DUREE_CONSERVATION = 36
   MAX_DUREE_CONSERVATION_EXPORT = 3.hours
 
@@ -44,9 +48,6 @@ class Procedure < ApplicationRecord
   accepts_nested_attributes_for :types_de_champ, reject_if: proc { |attributes| attributes['libelle'].blank? }, allow_destroy: true
   accepts_nested_attributes_for :types_de_champ_private, reject_if: proc { |attributes| attributes['libelle'].blank? }, allow_destroy: true
 
-  default_scope { where(hidden_at: nil) }
-  scope :hidden,                -> { unscope(where: :hidden_at).where.not(hidden_at: nil) }
-  scope :with_hidden,           -> { unscope(where: :hidden_at) }
   scope :brouillons,            -> { where(aasm_state: :brouillon) }
   scope :publiees,              -> { where(aasm_state: :publiee) }
   scope :closes,                -> { where(aasm_state: [:close, :depubliee]) }
@@ -99,7 +100,6 @@ class Procedure < ApplicationRecord
     state :brouillon, initial: true
     state :publiee
     state :close
-    state :hidden
     state :depubliee
 
     event :publish, before: :before_publish, after: :after_publish do
@@ -112,12 +112,6 @@ class Procedure < ApplicationRecord
       transitions from: :publiee, to: :close
     end
 
-    event :hide, after: :after_hide do
-      transitions from: :brouillon, to: :hidden
-      transitions from: :publiee, to: :hidden
-      transitions from: :close, to: :hidden
-    end
-
     event :unpublish, after: :after_unpublish do
       transitions from: :publiee, to: :depubliee
     end
@@ -597,6 +591,12 @@ class Procedure < ApplicationRecord
     groupe_instructeurs.count > 1
   end
 
+  def hide!
+    discard!
+    dossiers.discard_all
+    purge_export_files
+  end
+
   private
 
   def move_type_de_champ_attributes(types_de_champ, type_de_champ, new_index)
@@ -629,13 +629,6 @@ class Procedure < ApplicationRecord
     purge_export_files
   end
 
-  def after_hide
-    now = Time.zone.now
-    update!(hidden_at: now)
-    dossiers.update_all(hidden_at: now)
-    purge_export_files
-  end
-
   def after_unpublish
     update!(unpublished_at: Time.zone.now)
   end
diff --git a/app/models/user.rb b/app/models/user.rb
index 1191236c4..1515ed760 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -108,7 +108,7 @@ class User < ApplicationRecord
     dossiers.each do |dossier|
       dossier.delete_and_keep_track(administration)
     end
-    dossiers.with_hidden.destroy_all
+    dossiers.with_discarded.destroy_all
     destroy!
   end
 
diff --git a/app/views/manager/procedures/show.html.erb b/app/views/manager/procedures/show.html.erb
index 49fef4973..dd020bb5f 100644
--- a/app/views/manager/procedures/show.html.erb
+++ b/app/views/manager/procedures/show.html.erb
@@ -39,7 +39,7 @@ as well as a link to its edit page.
       <%= link_to 'whitelister', whitelist_manager_procedure_path(procedure), method: :post, class: 'button' %>
     <% end %>
 
-    <% if !procedure.hidden? %>
+    <% if !procedure.discarded? %>
       <%= link_to 'supprimer la démarche', hide_manager_procedure_path(procedure), method: :post, class: 'button', data: { confirm: "Confirmez-vous la suppression de la démarche ?" } %>
     <% end %>
   <div>
diff --git a/lib/tasks/2019_06_06_fix_timestamps_of_migrated_dossiers.rake b/lib/tasks/2019_06_06_fix_timestamps_of_migrated_dossiers.rake
index bfdf51a36..d4e97825d 100644
--- a/lib/tasks/2019_06_06_fix_timestamps_of_migrated_dossiers.rake
+++ b/lib/tasks/2019_06_06_fix_timestamps_of_migrated_dossiers.rake
@@ -4,7 +4,7 @@ namespace :fix_timestamps_of_migrated_dossiers do
   desc 'Fix the timestamps of dossiers affected by the faulty PJ migration'
   task run: :environment do
     affected_time_range = Time.utc(2019, 6, 4, 8, 0)..Time.utc(2019, 6, 4, 18, 0)
-    dossiers = Dossier.with_hidden.includes(:groupe_instructeur).where(groupe_instructeurs: { procedure_id: 0..1000 }).where(updated_at: affected_time_range)
+    dossiers = Dossier.with_discarded.includes(:groupe_instructeur).where(groupe_instructeurs: { procedure_id: 0..1000 }).where(updated_at: affected_time_range)
 
     progress = ProgressReport.new(dossiers.count)
 
diff --git a/lib/tasks/deployment/20190704133852_create_dummy_paths_for_archived_and_hidden_procedures.rake b/lib/tasks/deployment/20190704133852_create_dummy_paths_for_archived_and_hidden_procedures.rake
index bc3f1b2ca..ceefc8b86 100644
--- a/lib/tasks/deployment/20190704133852_create_dummy_paths_for_archived_and_hidden_procedures.rake
+++ b/lib/tasks/deployment/20190704133852_create_dummy_paths_for_archived_and_hidden_procedures.rake
@@ -3,7 +3,7 @@ namespace :after_party do
   task create_dummy_paths_for_archived_and_hidden_procedures: :environment do
     rake_puts "Running deploy task 'create_dummy_paths_for_archived_procedures'"
 
-    Procedure.with_hidden.archivees.where(path: nil).each do |p|
+    Procedure.with_discarded.archivees.where(path: nil).each do |p|
       p.update_column(:path, SecureRandom.uuid)
     end
 
diff --git a/lib/tasks/deployment/20190819142551_create_default_groupe_instructeur.rake b/lib/tasks/deployment/20190819142551_create_default_groupe_instructeur.rake
index ad7f33280..62337ef7e 100644
--- a/lib/tasks/deployment/20190819142551_create_default_groupe_instructeur.rake
+++ b/lib/tasks/deployment/20190819142551_create_default_groupe_instructeur.rake
@@ -2,7 +2,7 @@ namespace :after_party do
   desc 'Deployment task: create_default_groupe_instructeur'
   task create_default_groupe_instructeur: :environment do
     Procedure
-      .with_hidden
+      .with_discarded
       .left_outer_joins(:groupe_instructeurs)
       .where('groupe_instructeurs.id is null')
       .find_each do |procedure|
diff --git a/spec/factories/dossier.rb b/spec/factories/dossier.rb
index 1316e8d81..580878e2a 100644
--- a/spec/factories/dossier.rb
+++ b/spec/factories/dossier.rb
@@ -61,7 +61,7 @@ FactoryBot.define do
       archived { false }
     end
 
-    trait :hidden do
+    trait :discarded do
       hidden_at { Time.zone.now }
     end
 
diff --git a/spec/factories/procedure.rb b/spec/factories/procedure.rb
index e233f0503..1cf7e1b03 100644
--- a/spec/factories/procedure.rb
+++ b/spec/factories/procedure.rb
@@ -185,7 +185,7 @@ FactoryBot.define do
       end
     end
 
-    trait :hidden do
+    trait :discarded do
       after(:build) do |procedure, _evaluator|
         procedure.path = generate(:published_path)
         procedure.publish!
diff --git a/spec/jobs/find_dubious_procedures_job_spec.rb b/spec/jobs/find_dubious_procedures_job_spec.rb
index 158aca46e..06d1123b9 100644
--- a/spec/jobs/find_dubious_procedures_job_spec.rb
+++ b/spec/jobs/find_dubious_procedures_job_spec.rb
@@ -46,8 +46,8 @@ RSpec.describe FindDubiousProceduresJob, type: :job do
         it { expect(AdministrationMailer).to have_received(:dubious_procedures).with([]) }
       end
 
-      context 'and a hidden procedure' do
-        let(:procedure) { create(:procedure, :hidden) }
+      context 'and a discarded procedure' do
+        let(:procedure) { create(:procedure, :discarded) }
 
         it { expect(AdministrationMailer).to have_received(:dubious_procedures).with([]) }
       end
diff --git a/spec/lib/tasks/deployment/20190819142551_create_default_groupe_instructeur.rake_spec.rb b/spec/lib/tasks/deployment/20190819142551_create_default_groupe_instructeur.rake_spec.rb
index e6a264564..ff2be66e5 100644
--- a/spec/lib/tasks/deployment/20190819142551_create_default_groupe_instructeur.rake_spec.rb
+++ b/spec/lib/tasks/deployment/20190819142551_create_default_groupe_instructeur.rake_spec.rb
@@ -18,17 +18,17 @@ describe '20190819142551_create_default_groupe_instructeur.rake' do
     end
   end
 
-  context 'with a procedure hidden without gi' do
-    let!(:procedure_hidden_without_gi) { create(:procedure, :hidden) }
+  context 'with a procedure discarded without gi' do
+    let!(:procedure_discarded_without_gi) { create(:procedure, :discarded) }
 
     before do
-      procedure_hidden_without_gi.groupe_instructeurs.destroy_all
+      procedure_discarded_without_gi.groupe_instructeurs.destroy_all
     end
 
     it do
-      expect(procedure_hidden_without_gi.groupe_instructeurs).to be_empty
+      expect(procedure_discarded_without_gi.groupe_instructeurs).to be_empty
       subject
-      expect(procedure_hidden_without_gi.reload.groupe_instructeurs.pluck(:label)).to eq(['défaut'])
+      expect(procedure_discarded_without_gi.reload.groupe_instructeurs.pluck(:label)).to eq(['défaut'])
     end
   end
 
diff --git a/spec/models/dossier_spec.rb b/spec/models/dossier_spec.rb
index eb3c59399..5136380e3 100644
--- a/spec/models/dossier_spec.rb
+++ b/spec/models/dossier_spec.rb
@@ -8,31 +8,13 @@ describe Dossier do
   describe 'scopes' do
     describe '.default_scope' do
       let!(:dossier) { create(:dossier) }
-      let!(:hidden_dossier) { create(:dossier, :hidden) }
+      let!(:discarded_dossier) { create(:dossier, :discarded) }
 
       subject { Dossier.all }
 
       it { is_expected.to match_array([dossier]) }
     end
 
-    describe '.hidden' do
-      let!(:dossier) { create(:dossier) }
-      let!(:hidden_dossier) { create(:dossier, :hidden) }
-
-      subject { Dossier.all.hidden }
-
-      it { is_expected.to match_array([hidden_dossier]) }
-    end
-
-    describe '.with_hidden' do
-      let!(:dossier) { create(:dossier) }
-      let!(:hidden_dossier) { create(:dossier, :hidden) }
-
-      subject { Dossier.all.with_hidden }
-
-      it { is_expected.to match_array([dossier, hidden_dossier]) }
-    end
-
     describe '.without_followers' do
       let!(:dossier_with_follower) { create(:dossier, :followed, :with_entreprise, user: user) }
       let!(:dossier_without_follower) { create(:dossier, :with_entreprise, user: user) }
diff --git a/spec/models/invite_spec.rb b/spec/models/invite_spec.rb
index 1b3929b91..83e61935b 100644
--- a/spec/models/invite_spec.rb
+++ b/spec/models/invite_spec.rb
@@ -61,14 +61,14 @@ describe Invite do
     let(:dossier) { create(:dossier, hidden_at: hidden_at) }
     let!(:invite) { create(:invite, email: "email@totor.com", dossier: dossier) }
 
-    context "when dossier is not hidden" do
+    context "when dossier is not discarded" do
       let(:hidden_at) { nil }
 
       it { expect(Invite.count).to eq(1) }
       it { expect(Invite.all).to include(invite) }
     end
 
-    context "when dossier is hidden" do
+    context "when dossier is discarded" do
       let(:hidden_at) { 1.day.ago }
 
       it { expect(Invite.count).to eq(0) }
diff --git a/spec/models/procedure_spec.rb b/spec/models/procedure_spec.rb
index 7acd9ef99..c0c949bbd 100644
--- a/spec/models/procedure_spec.rb
+++ b/spec/models/procedure_spec.rb
@@ -153,22 +153,12 @@ describe Procedure do
 
   describe 'scopes' do
     let!(:procedure) { create(:procedure) }
-    let!(:hidden_procedure) { create(:procedure, :hidden) }
+    let!(:discarded_procedure) { create(:procedure, :discarded) }
 
     describe 'default_scope' do
       subject { Procedure.all }
       it { is_expected.to match_array([procedure]) }
     end
-
-    describe '.hidden' do
-      subject { Procedure.all.hidden }
-      it { is_expected.to match_array([hidden_procedure]) }
-    end
-
-    describe '.with_hidden' do
-      subject { Procedure.all.with_hidden }
-      it { is_expected.to match_array([procedure, hidden_procedure]) }
-    end
   end
 
   describe 'validation' do
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 1af6ae573..c96b769a9 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -259,7 +259,7 @@ describe User, type: :model do
       let!(:dossier_en_construction) { create(:dossier, :en_construction, user: user) }
       let!(:dossier_brouillon) { create(:dossier, user: user) }
 
-      context 'without a hidden dossier' do
+      context 'without a discarded dossier' do
         it "keep track of dossiers and delete user" do
           user.delete_and_keep_track_dossiers(administration)
 
@@ -269,7 +269,7 @@ describe User, type: :model do
         end
       end
 
-      context 'with a hidden dossier' do
+      context 'with a discarded dossier' do
         let!(:dossier_cache) do
           create(:dossier, :en_construction, user: user)
         end