diff --git a/app/models/attestation_template.rb b/app/models/attestation_template.rb
index a39f93995..f299d4c7b 100644
--- a/app/models/attestation_template.rb
+++ b/app/models/attestation_template.rb
@@ -54,27 +54,7 @@ class AttestationTemplate < ApplicationRecord
 
   def dup
     attestation_template = AttestationTemplate.new(title: title, body: body, footer: footer, activated: activated)
-
-    if logo.attached?
-      attestation_template.logo.attach(
-        io: StringIO.new(logo.download),
-        filename: logo.filename.to_s,
-        content_type: logo.content_type,
-        # we don't want to run virus scanner on duplicated file
-        metadata: { virus_scan_result: ActiveStorage::VirusScanner::SAFE }
-      )
-    end
-
-    if signature.attached?
-      attestation_template.signature.attach(
-        io: StringIO.new(signature.download),
-        filename: signature.filename.to_s,
-        content_type: signature.content_type,
-        # we don't want to run virus scanner on duplicated file
-        metadata: { virus_scan_result: ActiveStorage::VirusScanner::SAFE }
-      )
-    end
-
+    PiecesJustificativesService.clone_attachments(self, attestation_template)
     attestation_template
   end
 
diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index f58be81cf..5f6b12a9a 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -488,10 +488,7 @@ class Procedure < ApplicationRecord
     }
     include_list[:groupe_instructeurs] = :instructeurs if !is_different_admin
     procedure = self.deep_clone(include: include_list) do |original, kopy|
-      begin
-        PiecesJustificativesService.clone_attachments(original, kopy)
-      rescue ActiveStorage::FileNotFoundError, ActiveStorage::IntegrityError
-      end
+      PiecesJustificativesService.clone_attachments(original, kopy)
     end
     procedure.path = SecureRandom.uuid
     procedure.aasm_state = :brouillon
diff --git a/app/services/pieces_justificatives_service.rb b/app/services/pieces_justificatives_service.rb
index 648270116..8b9ccebc2 100644
--- a/app/services/pieces_justificatives_service.rb
+++ b/app/services/pieces_justificatives_service.rb
@@ -56,26 +56,22 @@ class PiecesJustificativesService
   end
 
   def self.clone_attachments(original, kopy)
-    if original.is_a?(TypeDeChamp)
+    case original
+    when TypeDeChamp
       clone_attachment(original.piece_justificative_template, kopy.piece_justificative_template)
-    elsif original.is_a?(Procedure)
+    when Procedure
       clone_attachment(original.logo, kopy.logo)
       clone_attachment(original.notice, kopy.notice)
       clone_attachment(original.deliberation, kopy.deliberation)
+    when AttestationTemplate
+      clone_attachment(original.logo, kopy.logo)
+      clone_attachment(original.signature, kopy.signature)
     end
   end
 
   def self.clone_attachment(original_attachment, copy_attachment)
     if original_attachment.attached?
-      original_attachment.open do |tempfile|
-        copy_attachment.attach({
-          io: File.open(tempfile.path),
-          filename: original_attachment.filename,
-          content_type: original_attachment.content_type,
-          # we don't want to run virus scanner on cloned file
-          metadata: { virus_scan_result: ActiveStorage::VirusScanner::SAFE }
-        })
-      end
+      copy_attachment.attach(original_attachment.blob)
     end
   end
 
diff --git a/spec/models/attestation_template_spec.rb b/spec/models/attestation_template_spec.rb
index 160c59de5..c71bd7e18 100644
--- a/spec/models/attestation_template_spec.rb
+++ b/spec/models/attestation_template_spec.rb
@@ -71,12 +71,14 @@ describe AttestationTemplate, type: :model do
       let(:attestation_template) { create(:attestation_template, :with_files) }
 
       it do
-        expect(subject.logo.blob).not_to eq(attestation_template.logo.blob)
+        expect(subject.logo.attachment).not_to eq(attestation_template.logo.attachment)
+        expect(subject.logo.blob).to eq(attestation_template.logo.blob)
         expect(subject.logo.attached?).to be_truthy
       end
 
       it do
-        expect(subject.signature.blob).not_to eq(attestation_template.signature.blob)
+        expect(subject.signature.attachment).not_to eq(attestation_template.signature.attachment)
+        expect(subject.signature.blob).to eq(attestation_template.signature.blob)
         expect(subject.signature.attached?).to be_truthy
       end
     end
diff --git a/spec/models/procedure_spec.rb b/spec/models/procedure_spec.rb
index e95f5236e..e3231587e 100644
--- a/spec/models/procedure_spec.rb
+++ b/spec/models/procedure_spec.rb
@@ -657,7 +657,23 @@ describe Procedure do
       let(:procedure) { create(:procedure, :with_notice, received_mail: received_mail, service: service) }
 
       it 'should duplicate notice' do
-        expect(subject.notice.attached?).to be true
+        expect(subject.notice.attached?).to be_truthy
+        expect(subject.notice.attachment).not_to eq(procedure.notice.attachment)
+        expect(subject.notice.attachment.blob).to eq(procedure.notice.attachment.blob)
+
+        subject.notice.attach(logo)
+        subject.reload
+        procedure.reload
+
+        expect(subject.notice.attached?).to be_truthy
+        expect(subject.notice.attachment.blob).not_to eq(procedure.notice.attachment.blob)
+
+        subject.notice.purge
+        subject.reload
+        procedure.reload
+
+        expect(subject.notice.attached?).to be_falsey
+        expect(procedure.notice.attached?).to be_truthy
       end
     end
 
@@ -677,16 +693,6 @@ describe Procedure do
         expect(subject.canonical_procedure).to be_nil
       end
     end
-
-    context 'with an pj not found' do
-      let(:procedure) { create(:procedure) }
-
-      before do
-        expect(PiecesJustificativesService).to receive(:clone_attachments).at_least(:once).and_raise(ActiveStorage::FileNotFoundError)
-      end
-
-      it { expect { procedure.clone(administrateur, false) }.not_to raise_error }
-    end
   end
 
   describe '#publish!' do