diff --git a/app/jobs/warn_expiring_dossiers_job.rb b/app/jobs/warn_expiring_dossiers_job.rb
deleted file mode 100644
index b1d099c8d..000000000
--- a/app/jobs/warn_expiring_dossiers_job.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-class WarnExpiringDossiersJob < CronJob
-  self.schedule_expression = "every 1 month at midnight"
-
-  def perform(*args)
-    expiring, expired = Dossier
-      .en_instruction_close_to_expiration
-      .partition(&:retention_expired?)
-
-    AdministrationMailer.dossier_expiration_summary(expiring, expired).deliver_later
-  end
-end
diff --git a/app/mailers/administration_mailer.rb b/app/mailers/administration_mailer.rb
index fde506f40..de5f9ef45 100644
--- a/app/mailers/administration_mailer.rb
+++ b/app/mailers/administration_mailer.rb
@@ -37,22 +37,4 @@ class AdministrationMailer < ApplicationMailer
     mail(to: EQUIPE_EMAIL,
       subject: subject)
   end
-
-  def dossier_expiration_summary(expiring_dossiers, expired_dossiers)
-    subject =
-      if expired_dossiers.present? && expiring_dossiers.present?
-        "Des dossiers ont dépassé leur délai de conservation, et d’autres en approchent"
-      elsif expired_dossiers.present?
-        "Des dossiers ont dépassé leur délai de conservation"
-      elsif expiring_dossiers.present?
-        "Des dossiers approchent de la fin de leur délai de conservation"
-      else
-        "Aucun dossier en fin de délai de conservation"
-      end
-
-    @expiring_dossiers = expiring_dossiers
-    @expired_dossiers = expired_dossiers
-
-    mail(to: TECH_EMAIL, subject: subject)
-  end
 end
diff --git a/app/models/dossier.rb b/app/models/dossier.rb
index adb1de4fd..f051c4b88 100644
--- a/app/models/dossier.rb
+++ b/app/models/dossier.rb
@@ -346,16 +346,6 @@ class Dossier < ApplicationRecord
     !brouillon? && !archived
   end
 
-  def retention_end_date
-    if instruction_commencee?
-      en_instruction_at + procedure.duree_conservation_dossiers_dans_ds.months
-    end
-  end
-
-  def retention_expired?
-    instruction_commencee? && retention_end_date <= Time.zone.now
-  end
-
   def en_construction_close_to_expiration?
     Dossier.en_construction_close_to_expiration.where(id: self).present?
   end
diff --git a/app/views/administration_mailer/dossier_expiration_summary.html.haml b/app/views/administration_mailer/dossier_expiration_summary.html.haml
deleted file mode 100644
index 74097d248..000000000
--- a/app/views/administration_mailer/dossier_expiration_summary.html.haml
+++ /dev/null
@@ -1,28 +0,0 @@
-- content_for(:title, 'Expiration du délai de conservation des dossiers')
-
-- if @expired_dossiers.present?
-  %h2= t('mail.administration.dossier_expiration_summary.expired_dossiers', count: @expired_dossiers.count)
-  - @expired_dossiers.group_by(&:procedure).each do |procedure, dossiers|
-    %dl
-      %dt
-        - if procedure.present?
-          #{procedure.libelle} (#{link_to(procedure.id, manager_procedure_url(procedure))}) :
-        - else
-          Procédure supprimée
-      %dd
-        = dossiers.map { |d| link_to(d.id, manager_dossier_url(d)) }.join(', ').html_safe
-
-- if @expiring_dossiers.present?
-  %h2= t('mail.administration.dossier_expiration_summary.expiring_dossiers', count: @expiring_dossiers.count)
-  - @expiring_dossiers.group_by(&:procedure).each do |procedure, dossiers|
-    %dl
-      %dt
-        - if procedure.present?
-          #{procedure.libelle} (#{link_to(procedure.id, manager_procedure_url(procedure))}) :
-        - else
-          Procédure supprimée
-      %dd
-        = dossiers.map { |d| link_to(d.id, manager_dossier_url(d)) }.join(', ').html_safe
-
-- if @expired_dossiers.empty? && @expiring_dossiers.empty?
-  Il n’y a pas de dossier expiré ou sur le point d’expirer.
diff --git a/spec/mailers/administration_mailer_spec.rb b/spec/mailers/administration_mailer_spec.rb
index d53c1509c..c570c36d2 100644
--- a/spec/mailers/administration_mailer_spec.rb
+++ b/spec/mailers/administration_mailer_spec.rb
@@ -33,36 +33,4 @@ RSpec.describe AdministrationMailer, type: :mailer do
 
     it { expect(subject.subject).not_to be_empty }
   end
-
-  describe '#dossier_expiration_summary' do
-    subject { described_class.dossier_expiration_summary(expiring, expired) }
-
-    context 'with expiring dossiers only' do
-      let(:expiring) { [create(:dossier)] }
-      let(:expired) { [] }
-
-      it { expect(subject.subject).to eq("Des dossiers approchent de la fin de leur délai de conservation") }
-    end
-
-    context 'with expired dossiers only' do
-      let(:expiring) { [] }
-      let(:expired) { [create(:dossier)] }
-
-      it { expect(subject.subject).to eq("Des dossiers ont dépassé leur délai de conservation") }
-    end
-
-    context 'with both expiring and expired dossiers' do
-      let(:expiring) { [create(:dossier)] }
-      let(:expired) { [create(:dossier)] }
-
-      it { expect(subject.subject).to eq("Des dossiers ont dépassé leur délai de conservation, et d’autres en approchent") }
-    end
-
-    context 'with neither expiring nor expired dossiers' do
-      let(:expiring) { [] }
-      let(:expired) { [] }
-
-      it { expect(subject.subject).to eq("Aucun dossier en fin de délai de conservation") }
-    end
-  end
 end
diff --git a/spec/models/dossier_spec.rb b/spec/models/dossier_spec.rb
index 6f18e8919..996c409bc 100644
--- a/spec/models/dossier_spec.rb
+++ b/spec/models/dossier_spec.rb
@@ -873,32 +873,6 @@ describe Dossier do
     end
   end
 
-  context "retention date" do
-    let(:procedure) { create(:procedure, duree_conservation_dossiers_dans_ds: 6) }
-    let(:uninstructed_dossier) { create(:dossier, :en_construction, procedure: procedure) }
-    let(:young_dossier) { create(:dossier, :en_instruction, en_instruction_at: Time.zone.now, procedure: procedure) }
-    let(:just_expired_dossier) { create(:dossier, :en_instruction, en_instruction_at: 6.months.ago, procedure: procedure) }
-    let(:long_expired_dossier) { create(:dossier, :en_instruction, en_instruction_at: 1.year.ago, procedure: procedure) }
-    let(:modif_date) { Time.zone.parse('01/01/2100') }
-
-    before { Timecop.freeze(modif_date) }
-    after { Timecop.return }
-
-    describe "#retention_end_date" do
-      it { expect(uninstructed_dossier.retention_end_date).to be_nil }
-      it { expect(young_dossier.retention_end_date).to eq(6.months.from_now) }
-      it { expect(just_expired_dossier.retention_end_date).to eq(Time.zone.now) }
-      it { expect(long_expired_dossier.retention_end_date).to eq(6.months.ago) }
-    end
-
-    describe "#retention_expired?" do
-      it { expect(uninstructed_dossier).not_to be_retention_expired }
-      it { expect(young_dossier).not_to be_retention_expired }
-      it { expect(just_expired_dossier).to be_retention_expired }
-      it { expect(long_expired_dossier).to be_retention_expired }
-    end
-  end
-
   describe '#accepter!' do
     let(:dossier) { create(:dossier, :en_instruction) }
     let(:last_operation) { dossier.dossier_operation_logs.last }