diff --git a/app/components/attachment/edit_component.rb b/app/components/attachment/edit_component.rb
index faee823c4..81803c113 100644
--- a/app/components/attachment/edit_component.rb
+++ b/app/components/attachment/edit_component.rb
@@ -4,14 +4,12 @@ class Attachment::EditComponent < ApplicationComponent
   attr_reader :attachment
   attr_reader :user_can_destroy
   alias user_can_destroy? user_can_destroy
-  attr_reader :user_can_replace
-  alias user_can_replace? user_can_replace
   attr_reader :as_multiple
   alias as_multiple? as_multiple
 
   EXTENSIONS_ORDER = ['jpeg', 'png', 'pdf', 'zip'].freeze
 
-  def initialize(champ: nil, auto_attach_url: nil, attached_file:, direct_upload: true, index: 0, as_multiple: false, view_as: :link, user_can_destroy: true, user_can_replace: false, **kwargs)
+  def initialize(champ: nil, auto_attach_url: nil, attached_file:, direct_upload: true, index: 0, as_multiple: false, view_as: :link, user_can_destroy: true, **kwargs)
     @as_multiple = as_multiple
     @attached_file = attached_file
     @auto_attach_url = auto_attach_url
@@ -20,7 +18,6 @@ class Attachment::EditComponent < ApplicationComponent
     @index = index
     @view_as = view_as
     @user_can_destroy = user_can_destroy
-    @user_can_replace = user_can_replace
 
     # attachment passed by kwarg because we don't want a default (nil) value.
     @attachment = if kwargs.key?(:attachment)
@@ -67,7 +64,7 @@ class Attachment::EditComponent < ApplicationComponent
   def file_field_options
     track_issue_with_missing_validators if missing_validators?
     {
-      class: class_names("fr-upload attachment-input": true, "#{attachment_input_class}": true, "hidden": persisted?, "fr-mt-2w": user_can_replace?),
+      class: class_names("fr-upload attachment-input": true, "#{attachment_input_class}": true, "hidden": persisted?),
       direct_upload: @direct_upload,
       id: input_id,
       aria: { describedby: champ&.describedby_id },
@@ -75,7 +72,6 @@ class Attachment::EditComponent < ApplicationComponent
         auto_attach_url:,
         turbo_force: :server
       }.merge(has_file_size_validator? ? { max_file_size: } : {})
-        .merge(user_can_replace? ? { replace_attachment_target: "input" } : {})
     }.merge(has_content_type_validator? ? { accept: accept_content_type } : {})
   end
 
@@ -118,14 +114,6 @@ class Attachment::EditComponent < ApplicationComponent
     }
   end
 
-  def replace_controller_attributes
-    return {} if !persisted? || !user_can_replace? || as_multiple?
-
-    {
-      "data-controller": 'replace-attachment'
-    }
-  end
-
   def retry_button_options
     {
       type: 'button',
@@ -177,10 +165,7 @@ class Attachment::EditComponent < ApplicationComponent
 
   def auto_attach_url
     return @auto_attach_url if @auto_attach_url.present?
-
-    params = { replace_attachment_id: @attachment.id } if user_can_replace? && @attachment.present?
-
-    return helpers.auto_attach_url(@champ, params) if @champ.present?
+    return helpers.auto_attach_url(@champ) if @champ.present?
 
     nil
   end
diff --git a/app/components/attachment/edit_component/edit_component.html.haml b/app/components/attachment/edit_component/edit_component.html.haml
index 298972b2d..5845e8dad 100644
--- a/app/components/attachment/edit_component/edit_component.html.haml
+++ b/app/components/attachment/edit_component/edit_component.html.haml
@@ -1,12 +1,10 @@
-.attachment.fr-upload-group{ { id: attachment ? dom_id(attachment, :edit) : nil, class: class_names("fr-mb-1w": !(as_multiple? && downloadable?)) }.compact, **replace_controller_attributes }
+.attachment.fr-upload-group{ { id: attachment ? dom_id(attachment, :edit) : nil, class: class_names("fr-mb-1w": !(as_multiple? && downloadable?)) }.compact }
   - if persisted?
     %div{ id: dom_id(attachment, :persisted_row) }
       .flex.flex-gap-2{ class: class_names("attachment-error": attachment.virus_scanner_error?) }
         - if user_can_destroy?
           = render NestedForms::OwnedButtonComponent.new(formaction: destroy_attachment_path, http_method: :delete, opt: {class: "fr-btn fr-btn--tertiary fr-btn--sm fr-icon-delete-line", title: t(".delete_file", filename: attachment.filename)}) do
             = t('.delete')
-        - elsif user_can_replace?
-          = button_tag t('.replace'), **replace_button_options, class: "fr-btn fr-btn--tertiary fr-btn--sm", title: t(".replace_file", filename: attachment.filename)
 
         - if downloadable?
           = render Dsfr::DownloadComponent.new(attachment:)
diff --git a/app/components/attachment/multiple_component.rb b/app/components/attachment/multiple_component.rb
index 2a1baa3d7..c0229bf90 100644
--- a/app/components/attachment/multiple_component.rb
+++ b/app/components/attachment/multiple_component.rb
@@ -12,18 +12,15 @@ class Attachment::MultipleComponent < ApplicationComponent
   attr_reader :view_as
   attr_reader :user_can_destroy
   alias user_can_destroy? user_can_destroy
-  attr_reader :user_can_replace
-  alias user_can_replace? user_can_replace
 
   delegate :count, :empty?, to: :attachments, prefix: true
 
-  def initialize(champ:, attached_file:, form_object_name: nil, view_as: :link, user_can_destroy: true, user_can_replace: false, max: nil)
+  def initialize(champ:, attached_file:, form_object_name: nil, view_as: :link, user_can_destroy: true, max: nil)
     @champ = champ
     @attached_file = attached_file
     @form_object_name = form_object_name
     @view_as = view_as
     @user_can_destroy = user_can_destroy
-    @user_can_replace = user_can_replace
     @max = max || DEFAULT_MAX_ATTACHMENTS
 
     @attachments = attached_file.attachments || []
@@ -51,12 +48,4 @@ class Attachment::MultipleComponent < ApplicationComponent
 
     nil
   end
-
-  def replace_controller_attributes
-    return {} unless user_can_replace?
-
-    {
-      "data-controller": 'replace-attachment'
-    }
-  end
 end
diff --git a/app/components/attachment/multiple_component/multiple_component.html.haml b/app/components/attachment/multiple_component/multiple_component.html.haml
index 331bb7fd3..545387758 100644
--- a/app/components/attachment/multiple_component/multiple_component.html.haml
+++ b/app/components/attachment/multiple_component/multiple_component.html.haml
@@ -1,14 +1,14 @@
-.attachment-multiple{ class: class_names("fr-downloads-group": view_as == :download, "destroyable": user_can_destroy?), **replace_controller_attributes }
+.attachment-multiple{ class: class_names("fr-downloads-group": view_as == :download, "destroyable": user_can_destroy?) }
   = template
 
   - if @attachments.size >= 1
     %ul.fr-my-1v
       - each_attachment do |attachment, index|
         %li{ id: dom_id(attachment) }
-          = render Attachment::EditComponent.new(champ:, attached_file:, attachment:, index:, as_multiple: true, view_as:, user_can_destroy:, user_can_replace:, form_object_name:)
+          = render Attachment::EditComponent.new(champ:, attached_file:, attachment:, index:, as_multiple: true, view_as:, user_can_destroy:, form_object_name:)
 
   %div{ id: empty_component_id, class: class_names("hidden": !can_attach_next?), data: { turbo_force: :server } }
-    = render Attachment::EditComponent.new(champ:, attached_file:, attachment: nil, index: attachments_count, user_can_destroy:, user_can_replace:, form_object_name:)
+    = render Attachment::EditComponent.new(champ:, attached_file:, attachment: nil, index: attachments_count, user_can_destroy:, form_object_name:)
 
   // single poll and refresh message for all attachments
   = render Attachment::PendingPollComponent.new(attachments: attachments, poll_url:, context: poll_context)
diff --git a/app/components/editable_champ/piece_justificative_component.rb b/app/components/editable_champ/piece_justificative_component.rb
index a06afe293..95b3ff21a 100644
--- a/app/components/editable_champ/piece_justificative_component.rb
+++ b/app/components/editable_champ/piece_justificative_component.rb
@@ -15,10 +15,6 @@ class EditableChamp::PieceJustificativeComponent < EditableChamp::EditableChampB
     !@champ.mandatory? || @champ.dossier.brouillon?
   end
 
-  def user_can_replace?
-    @champ.mandatory? && @champ.dossier.en_construction?
-  end
-
   def max
     [true, nil].include?(@champ.procedure&.piece_justificative_multiple?) ? Attachment::MultipleComponent::DEFAULT_MAX_ATTACHMENTS : 1
   end
diff --git a/app/components/editable_champ/piece_justificative_component/piece_justificative_component.html.haml b/app/components/editable_champ/piece_justificative_component/piece_justificative_component.html.haml
index 322c029aa..4d549cb22 100644
--- a/app/components/editable_champ/piece_justificative_component/piece_justificative_component.html.haml
+++ b/app/components/editable_champ/piece_justificative_component/piece_justificative_component.html.haml
@@ -1,4 +1,4 @@
-= render Attachment::MultipleComponent.new(champ: @champ, attached_file: @champ.piece_justificative_file, form_object_name: @form.object_name, view_as:, user_can_destroy: user_can_destroy?, user_can_replace: user_can_replace?, max:) do |c|
+= render Attachment::MultipleComponent.new(champ: @champ, attached_file: @champ.piece_justificative_file, form_object_name: @form.object_name, view_as:, user_can_destroy: user_can_destroy?, max:) do |c|
   - if @champ.type_de_champ.piece_justificative_template&.attached?
     - c.with_template do
       = render partial: "shared/piece_justificative_template", locals: { champ: @champ }
diff --git a/app/components/editable_champ/titre_identite_component.rb b/app/components/editable_champ/titre_identite_component.rb
index f29585ae2..c1b916517 100644
--- a/app/components/editable_champ/titre_identite_component.rb
+++ b/app/components/editable_champ/titre_identite_component.rb
@@ -6,8 +6,4 @@ class EditableChamp::TitreIdentiteComponent < EditableChamp::EditableChampBaseCo
   def user_can_destroy?
     !@champ.mandatory? || @champ.dossier.brouillon?
   end
-
-  def user_can_replace?
-    @champ.mandatory? && @champ.dossier.en_construction?
-  end
 end
diff --git a/app/components/editable_champ/titre_identite_component/titre_identite_component.html.haml b/app/components/editable_champ/titre_identite_component/titre_identite_component.html.haml
index 22f93966c..cded40cc7 100644
--- a/app/components/editable_champ/titre_identite_component/titre_identite_component.html.haml
+++ b/app/components/editable_champ/titre_identite_component/titre_identite_component.html.haml
@@ -1,4 +1,4 @@
 - if @champ.type_de_champ.piece_justificative_template&.attached?
   = render partial: "shared/piece_justificative_template", locals: { champ: @champ }
 = render Attachment::EditComponent.new(champ: @form.object, attached_file: @champ.piece_justificative_file, attachment: @champ.piece_justificative_file[0], form_object_name: @form.object_name,
-  user_can_destroy: user_can_destroy?, user_can_replace: user_can_replace?)
+  user_can_destroy: user_can_destroy?)
diff --git a/app/controllers/champs/piece_justificative_controller.rb b/app/controllers/champs/piece_justificative_controller.rb
index b75ed8f88..20d865492 100644
--- a/app/controllers/champs/piece_justificative_controller.rb
+++ b/app/controllers/champs/piece_justificative_controller.rb
@@ -31,14 +31,7 @@ class Champs::PieceJustificativeController < ApplicationController
     save_succeed = nil
 
     ActiveStorage::Attachment.transaction do
-      if params.key?(:replace_attachment_id)
-        @champ.piece_justificative_file.attachments.find do
-          _1.id == params[:replace_attachment_id].to_i
-        end&.destroy
-      end
-
       @champ.piece_justificative_file.attach(params[:blob_signed_id])
-
       save_succeed = @champ.save
     end
 
diff --git a/app/javascript/controllers/replace_attachment_controller.ts b/app/javascript/controllers/replace_attachment_controller.ts
deleted file mode 100644
index cefe608cd..000000000
--- a/app/javascript/controllers/replace_attachment_controller.ts
+++ /dev/null
@@ -1,30 +0,0 @@
-import { ApplicationController } from './application_controller';
-import { show } from '@utils';
-
-export class ReplaceAttachmentController extends ApplicationController {
-  static targets = ['input'];
-
-  declare readonly inputTarget: HTMLInputElement;
-
-  open(event: Event) {
-    show(this.inputTarget);
-    this.inputTarget.click(); // opens input prompt
-
-    const target = event.currentTarget as HTMLButtonElement;
-
-    if (target.dataset.autoAttachUrl) {
-      // set the auto attach url specific to this button to replace the related attachment
-      this.inputTarget.dataset.originalAutoAttachUrl =
-        this.inputTarget.dataset.autoAttachUrl;
-
-      this.inputTarget.dataset.autoAttachUrl = target.dataset.autoAttachUrl;
-
-      // reset autoAttachUrl which would add an attachment
-      // when replace is not finalized
-      this.on(this.inputTarget, 'cancel', () => {
-        this.inputTarget.dataset.autoAttachUrl =
-          this.inputTarget.dataset.originalAutoAttachUrl;
-      });
-    }
-  }
-}
diff --git a/spec/components/attachment/multiple_component_spec.rb b/spec/components/attachment/multiple_component_spec.rb
index 23f585d55..e5f72fbe7 100644
--- a/spec/components/attachment/multiple_component_spec.rb
+++ b/spec/components/attachment/multiple_component_spec.rb
@@ -93,18 +93,6 @@ RSpec.describe Attachment::MultipleComponent, type: :component do
     end
   end
 
-  context 'when user can replace' do
-    let(:kwargs) { { user_can_replace: true } }
-
-    before do
-      attach_to_champ(attached_file, champ)
-    end
-
-    it 'setup controller' do
-      expect(subject).to have_selector('[data-controller=replace-attachment]').once
-    end
-  end
-
   def attach_to_champ(attached_file, champ)
     attached_file.attach(
       io: StringIO.new("x" * 2),
diff --git a/spec/controllers/champs/piece_justificative_controller_spec.rb b/spec/controllers/champs/piece_justificative_controller_spec.rb
index 0799c4c29..26b1a2e21 100644
--- a/spec/controllers/champs/piece_justificative_controller_spec.rb
+++ b/spec/controllers/champs/piece_justificative_controller_spec.rb
@@ -5,8 +5,6 @@ describe Champs::PieceJustificativeController, type: :controller do
   let(:champ) { dossier.champs_public.first }
 
   describe '#update' do
-    let(:replace_attachment_id) { nil }
-
     render_views
     before { sign_in user }
 
@@ -14,8 +12,7 @@ describe Champs::PieceJustificativeController, type: :controller do
       put :update, params: {
         position: '1',
         champ_id: champ.id,
-        blob_signed_id: file,
-        replace_attachment_id:
+        blob_signed_id: file
       }.compact, format: :turbo_stream
     end
 
@@ -68,33 +65,6 @@ describe Champs::PieceJustificativeController, type: :controller do
         expect(response.parsed_body).to eq({ 'errors' => ['La pièce justificative n’est pas d’un type accepté'] })
       end
     end
-
-    context 'replace an attachment' do
-      let(:file) { fixture_file_upload('spec/fixtures/files/piece_justificative_0.pdf', 'application/pdf') }
-      before { subject }
-
-      context "attachment associated to dossier" do
-        let(:champ) { create(:champ, :with_piece_justificative_file, dossier:) }
-        let(:replace_attachment_id) { champ.piece_justificative_file.first.id }
-
-        it "replaces an existing attachment" do
-          champ.reload
-
-          expect(champ.piece_justificative_file.attachments.count).to eq(1)
-          expect(champ.piece_justificative_file.attachments.first.filename).to eq("piece_justificative_0.pdf")
-        end
-      end
-
-      context "attachment not associated to dossier" do
-        let(:other_champ) { create(:champ, :with_piece_justificative_file) }
-        let(:replace_attachment_id) { other_champ.piece_justificative_file.first.id }
-
-        it "add attachment, don't replace attachment" do
-          expect(champ.reload.piece_justificative_file.attachments.count).to eq(1)
-          expect(other_champ.reload.piece_justificative_file.attachments.count).to eq(1)
-        end
-      end
-    end
   end
 
   describe '#template' do