diff --git a/app/components/procedure/invitation_with_typo_component.rb b/app/components/procedure/invitation_with_typo_component.rb
new file mode 100644
index 000000000..efd6cd15a
--- /dev/null
+++ b/app/components/procedure/invitation_with_typo_component.rb
@@ -0,0 +1,11 @@
+class Procedure::InvitationWithTypoComponent < ApplicationComponent
+  def initialize(maybe_typos:, url:, title:)
+    @maybe_typos = maybe_typos
+    @url = url
+    @title = title
+  end
+
+  def render?
+    @maybe_typos.present?
+  end
+end
diff --git a/app/components/procedure/invitation_with_typo_component/invitation_with_typo_component.html.haml b/app/components/procedure/invitation_with_typo_component/invitation_with_typo_component.html.haml
new file mode 100644
index 000000000..63c9be415
--- /dev/null
+++ b/app/components/procedure/invitation_with_typo_component/invitation_with_typo_component.html.haml
@@ -0,0 +1,10 @@
+= render Dsfr::AlertComponent.new(title: "nous pensons avoir identifié une faute de frappe : ", state: :warning, extra_class_names: 'fr-mb-3w') do |c|
+  - c.with_body do
+    %p= @title
+    %ul#maybe_typos_errors
+      - @maybe_typos.each do |(actual_email, suggested_email)|
+        %li
+          = "Je confirme "
+          = button_to "#{actual_email}", @url, method: :POST, params: { final_email: actual_email }, class: 'fr-btn fr-btn--tertiary fr-btn--sm', form: {class: 'inline'}
+          = " ou "
+          = button_to "#{suggested_email}", @url, method: :POST, params: { final_email: suggested_email }, class: 'fr-btn fr-btn--tertiary fr-btn--sm', form: {class: 'inline'}
diff --git a/app/controllers/administrateurs/experts_procedures_controller.rb b/app/controllers/administrateurs/experts_procedures_controller.rb
index 1a59bcba5..454b72730 100644
--- a/app/controllers/administrateurs/experts_procedures_controller.rb
+++ b/app/controllers/administrateurs/experts_procedures_controller.rb
@@ -1,25 +1,32 @@
 module Administrateurs
   class ExpertsProceduresController < AdministrateurController
+    include EmailSanitizableConcern
     before_action :retrieve_procedure
+    before_action :retrieve_experts_procedure, only: [:index]
+    before_action :retrieve_experts_emails, only: [:index]
 
     def index
-      @experts_procedure = @procedure
-        .experts_procedures
-        .where(revoked_at: nil)
-        .sort_by { |expert_procedure| expert_procedure.expert.email }
-      @experts_emails = experts_procedure_emails
     end
 
     def create
       emails = params['emails'].presence || [].to_json
-      emails = JSON.parse(emails).map(&:strip).map(&:downcase)
+      emails = JSON.parse(emails).map { EmailSanitizer.sanitize(_1) }
+      @maybe_typos, emails = emails
+        .map { |email| [email, EmailChecker.check(email:)[:suggestions]&.first] }
+        .partition { _1[1].present? }
+      errors = if !@maybe_typos.empty?
+        ["Attention, nous pensons avoir identifié une faute de frappe dans les invitations : #{@maybe_typos.map(&:first).join(', ')}. Veuillez, #{view_context.link_to(" verifier l'orthographe", "#maybe_typos_errors")} des invitations."]
+      else
+        []
+      end
+      emails += [EmailSanitizer.sanitize(params['final_email'])] if params['final_email'].present?
 
       valid_users, invalid_users = emails
         .map { |email| User.create_or_promote_to_expert(email, SecureRandom.hex) }
         .partition(&:valid?)
 
       if invalid_users.any?
-        flash[:alert] = invalid_users
+        errors += invalid_users
           .filter { |user| user.errors.present? }
           .map { |user| "#{user.email} : #{user.errors.full_messages_for(:email).join(', ')}" }
       end
@@ -32,12 +39,16 @@ module Administrateurs
           end
         end
 
-        flash[:notice] = t('.experts_assignment',
+        flash.now[:notice] = t('.experts_assignment',
           count: valid_users.count,
           value: valid_users.map(&:email).join(', '),
           procedure: @procedure.id)
       end
-      redirect_to admin_procedure_experts_path(@procedure)
+
+      flash.now[:alert] = errors.join(". ") if !errors.empty?
+      retrieve_experts_procedure
+      retrieve_experts_emails
+      render :index
     end
 
     def update
@@ -57,8 +68,12 @@ module Administrateurs
 
     private
 
-    def experts_procedure_emails
-      @procedure.experts.map(&:email).sort
+    def retrieve_experts_procedure
+      @experts_procedure ||= @procedure.experts_procedures.where(revoked_at: nil).sort_by { _1.expert.email }
+    end
+
+    def retrieve_experts_emails
+      @experts_emails ||= @experts_procedure.map { _1.expert.email }
     end
 
     def expert_procedure_params
diff --git a/app/controllers/email_checker_controller.rb b/app/controllers/email_checker_controller.rb
index 19cd0493b..b794b4d7a 100644
--- a/app/controllers/email_checker_controller.rb
+++ b/app/controllers/email_checker_controller.rb
@@ -1,5 +1,5 @@
 class EmailCheckerController < ApplicationController
   def show
-    render json: EmailChecker.new.check(email: params[:email])
+    render json: EmailChecker.check(email: params[:email])
   end
 end
diff --git a/app/javascript/controllers/email_input_controller.ts b/app/javascript/controllers/email_input_controller.ts
index f8442e1d3..d0afb3168 100644
--- a/app/javascript/controllers/email_input_controller.ts
+++ b/app/javascript/controllers/email_input_controller.ts
@@ -4,7 +4,7 @@ import { ApplicationController } from './application_controller';
 
 type checkEmailResponse = {
   success: boolean;
-  email_suggestions: string[];
+  suggestions: string[];
 };
 
 export class EmailInputController extends ApplicationController {
@@ -36,8 +36,8 @@ export class EmailInputController extends ApplicationController {
       url.toString()
     ).json();
 
-    if (data && data.email_suggestions && data.email_suggestions.length > 0) {
-      this.suggestionTarget.innerHTML = data.email_suggestions[0];
+    if (data && data.suggestions && data.suggestions.length > 0) {
+      this.suggestionTarget.innerHTML = data.suggestions[0];
       show(this.ariaRegionTarget);
       this.ariaRegionTarget.setAttribute('aria-live', 'assertive');
     }
diff --git a/app/lib/email_checker.rb b/app/lib/email_checker.rb
index e2d2d5222..bf1a2d871 100644
--- a/app/lib/email_checker.rb
+++ b/app/lib/email_checker.rb
@@ -615,7 +615,7 @@ class EmailChecker
     'ac-toulous.fr'
   ].freeze
 
-  def check(email:)
+  def self.check(email:)
     return { success: false } if email.blank?
 
     parsed_email = Mail::Address.new(EmailSanitizableConcern::EmailSanitizer.sanitize(email))
@@ -626,29 +626,29 @@ class EmailChecker
     similar_domains = closest_domains(domain: parsed_email.domain)
     return { success: true } if similar_domains.empty?
 
-    { success: true, email_suggestions: email_suggestions(parsed_email:, similar_domains:) }
+    { success: true, suggestions: suggestions(parsed_email:, similar_domains:) }
   rescue Mail::Field::IncompleteParseError
     return { success: false }
   end
 
   private
 
-  def closest_domains(domain:)
+  def self.closest_domains(domain:)
     KNOWN_DOMAINS.filter do |known_domain|
       close_by_distance_of(domain, known_domain, distance: 1) ||
       with_same_chars_and_close_by_distance_of(domain, known_domain, distance: 2)
     end
   end
 
-  def close_by_distance_of(a, b, distance:)
+  def self.close_by_distance_of(a, b, distance:)
     String::Similarity.levenshtein_distance(a, b) == distance
   end
 
-  def with_same_chars_and_close_by_distance_of(a, b, distance:)
+  def self.with_same_chars_and_close_by_distance_of(a, b, distance:)
     close_by_distance_of(a, b, distance: 2) && a.chars.sort == b.chars.sort
   end
 
-  def email_suggestions(parsed_email:, similar_domains:)
+  def self.suggestions(parsed_email:, similar_domains:)
     similar_domains.map { Mail::Address.new("#{parsed_email.local}@#{_1}").to_s }
   end
 end
diff --git a/app/views/administrateurs/experts_procedures/index.html.haml b/app/views/administrateurs/experts_procedures/index.html.haml
index dc8909f82..bffd9f792 100644
--- a/app/views/administrateurs/experts_procedures/index.html.haml
+++ b/app/views/administrateurs/experts_procedures/index.html.haml
@@ -58,6 +58,7 @@
 
       - if @procedure.experts_require_administrateur_invitation?
         .card
+          = render Procedure::InvitationWithTypoComponent.new(maybe_typos: @maybe_typos, url: admin_procedure_experts_path(@procedure), title: "Avant d'ajouter l'email à la liste d'expert prédéfinie, veuillez confirmer" )
           = form_for :experts_procedure,
             url: admin_procedure_experts_path(@procedure),
             html: { class: 'form' } do |f|
diff --git a/spec/controllers/administrateurs/experts_procedures_controller_spec.rb b/spec/controllers/administrateurs/experts_procedures_controller_spec.rb
index 6a9ca33d5..92f84d7e6 100644
--- a/spec/controllers/administrateurs/experts_procedures_controller_spec.rb
+++ b/spec/controllers/administrateurs/experts_procedures_controller_spec.rb
@@ -21,23 +21,47 @@ describe Administrateurs::ExpertsProceduresController, type: :controller do
   describe '#create' do
     let(:expert) { create(:expert) }
     let(:expert2) { create(:expert) }
+    let(:procedure) { create :procedure, administrateur: admin, experts_require_administrateur_invitation: true }
 
-    subject do
-      post :create, params: {
-        procedure_id: procedure.id,
-        emails: "[\"#{expert.email}\",\"#{expert2.email}\"]"
-      }
+    subject { post :create, params: params }
+    before { subject }
+
+    context 'when inviting multiple valid experts' do
+      let(:params) { { procedure_id: procedure.id, emails: [expert.email, expert2.email].to_json } }
+
+      it 'creates experts' do
+        expect(procedure.experts.include?(expert)).to be_truthy
+        expect(procedure.experts.include?(expert2)).to be_truthy
+        expect(flash.notice).to be_present
+        expect(assigns(:maybe_typos)).to eq([])
+        expect(response).to have_http_status(:success)
+      end
     end
 
-    before do
-      subject
+    context 'when inviting expert using an email with typos' do
+      let(:params) { { procedure_id: procedure.id, emails: ['martin@oraneg.fr'].to_json } }
+      render_views
+      it 'warns' do
+        expect(flash.alert).to be_present
+        expect(assigns(:maybe_typos)).to eq([['martin@oraneg.fr', 'martin@orange.fr']])
+        expect(response).to have_http_status(:success)
+      end
     end
 
-    context 'of multiple experts' do
-      it { expect(procedure.experts.include?(expert)).to be_truthy }
-      it { expect(procedure.experts.include?(expert2)).to be_truthy }
-      it { expect(flash.notice).to be_present }
-      it { expect(response).to redirect_to(admin_procedure_experts_path(procedure)) }
+    context 'when forcing email with typos' do
+      render_views
+      let(:final_email) { 'martin@oraneg.fr' }
+      let(:params) { { procedure_id: procedure.id, final_email: } }
+
+      it 'works' do
+        created_user = User.where(email: final_email).first
+        expect(created_user).to be_an_instance_of(User)
+        expect(created_user.expert).to be_an_instance_of(Expert)
+        expect(procedure.experts.include?(created_user.expert)).to be_truthy
+        expect(flash.notice).to be_present
+        expect(response).to have_http_status(:success)
+        expect(response.body).to have_content(final_email)
+      end
     end
   end
 
diff --git a/spec/controllers/email_checker_controller_spec.rb b/spec/controllers/email_checker_controller_spec.rb
index 685bd5de9..bcb232301 100644
--- a/spec/controllers/email_checker_controller_spec.rb
+++ b/spec/controllers/email_checker_controller_spec.rb
@@ -16,7 +16,7 @@ describe EmailCheckerController, type: :controller do
       let(:params) { { email: 'martin@orane.fr' } }
       it do
         expect(response).to have_http_status(:success)
-        expect(body).to eq({ success: true, email_suggestions: ['martin@orange.fr'] })
+        expect(body).to eq({ success: true, suggestions: ['martin@orange.fr'] })
       end
     end
 
diff --git a/spec/lib/email_checker_spec.rb b/spec/lib/email_checker_spec.rb
index f9c35ea91..fd650ff31 100644
--- a/spec/lib/email_checker_spec.rb
+++ b/spec/lib/email_checker_spec.rb
@@ -1,6 +1,6 @@
 describe EmailChecker do
   describe 'check' do
-    subject { described_class.new }
+    subject { described_class }
 
     it 'works with identified use cases' do
       expect(subject.check(email: nil)).to eq({ success: false })
@@ -10,22 +10,22 @@ describe EmailChecker do
       # allow same domain
       expect(subject.check(email: "martin@orange.fr")).to eq({ success: true })
       # find difference of 1 lev distance
-      expect(subject.check(email: "martin@orane.fr")).to eq({ success: true, email_suggestions: ['martin@orange.fr'] })
+      expect(subject.check(email: "martin@orane.fr")).to eq({ success: true, suggestions: ['martin@orange.fr'] })
       # find difference of 2 lev distance, only with same chars
-      expect(subject.check(email: "martin@oragne.fr")).to eq({ success: true, email_suggestions: ['martin@orange.fr'] })
+      expect(subject.check(email: "martin@oragne.fr")).to eq({ success: true, suggestions: ['martin@orange.fr'] })
       # ignore unknown domain
       expect(subject.check(email: "martin@ore.fr")).to eq({ success: true })
     end
 
     it 'passes through real use cases, with levenshtein_distance 1' do
-      expect(subject.check(email: "martin@asn.com")).to eq({ success: true, email_suggestions: ['martin@msn.com'] })
-      expect(subject.check(email: "martin@gamail.com")).to eq({ success: true, email_suggestions: ['martin@gmail.com'] })
-      expect(subject.check(email: "martin@glail.com")).to eq({ success: true, email_suggestions: ['martin@gmail.com'] })
-      expect(subject.check(email: "martin@gmail.coml")).to eq({ success: true, email_suggestions: ['martin@gmail.com'] })
-      expect(subject.check(email: "martin@gmail.con")).to eq({ success: true, email_suggestions: ['martin@gmail.com'] })
-      expect(subject.check(email: "martin@hotmil.fr")).to eq({ success: true, email_suggestions: ['martin@hotmail.fr'] })
-      expect(subject.check(email: "martin@mail.com")).to eq({ success: true, email_suggestions: ["martin@gmail.com", "martin@ymail.com", "martin@mailo.com"] })
-      expect(subject.check(email: "martin@msc.com")).to eq({ success: true, email_suggestions: ["martin@msn.com", "martin@mac.com"] })
+      expect(subject.check(email: "martin@asn.com")).to eq({ success: true, suggestions: ['martin@msn.com'] })
+      expect(subject.check(email: "martin@gamail.com")).to eq({ success: true, suggestions: ['martin@gmail.com'] })
+      expect(subject.check(email: "martin@glail.com")).to eq({ success: true, suggestions: ['martin@gmail.com'] })
+      expect(subject.check(email: "martin@gmail.coml")).to eq({ success: true, suggestions: ['martin@gmail.com'] })
+      expect(subject.check(email: "martin@gmail.con")).to eq({ success: true, suggestions: ['martin@gmail.com'] })
+      expect(subject.check(email: "martin@hotmil.fr")).to eq({ success: true, suggestions: ['martin@hotmail.fr'] })
+      expect(subject.check(email: "martin@mail.com")).to eq({ success: true, suggestions: ["martin@gmail.com", "martin@ymail.com", "martin@mailo.com"] })
+      expect(subject.check(email: "martin@msc.com")).to eq({ success: true, suggestions: ["martin@msn.com", "martin@mac.com"] })
       expect(subject.check(email: "martin@ymail.com")).to eq({ success: true })
     end