diff --git a/app/controllers/concerns/create_avis_concern.rb b/app/controllers/concerns/create_avis_concern.rb
index 263eb93d768..7f1a51c4a3c 100644
--- a/app/controllers/concerns/create_avis_concern.rb
+++ b/app/controllers/concerns/create_avis_concern.rb
@@ -62,7 +62,11 @@ def create_avis_from_params(dossier, instructeur_or_expert, confidentiel = false
         avis.dossier.demander_un_avis!(avis)
         if avis.dossier == dossier
           if avis.experts_procedure.notify_on_new_avis?
-            AvisMailer.avis_invitation(avis).deliver_later
+            if avis.expert.user.unverified_email?
+              avis.expert.user.invite_expert_and_send_avis!(avis)
+            else
+              AvisMailer.avis_invitation(avis).deliver_later
+            end
           end
           sent_emails_addresses << avis.expert.email
           # the email format is already verified, we update value to nil
diff --git a/app/controllers/experts/avis_controller.rb b/app/controllers/experts/avis_controller.rb
index 635ebbb4971..f05d6d4117e 100644
--- a/app/controllers/experts/avis_controller.rb
+++ b/app/controllers/experts/avis_controller.rb
@@ -146,6 +146,7 @@ def update_expert
 
       if user.valid?
         sign_in(user)
+        user.update!(email_verified_at: Time.zone.now) if user.unverified_email?
         redirect_to url_for(expert_all_avis_path)
       else
         flash[:alert] = user.errors.full_messages
diff --git a/app/controllers/instructeurs/avis_controller.rb b/app/controllers/instructeurs/avis_controller.rb
index 1d6a9b47361..858a4c5e299 100644
--- a/app/controllers/instructeurs/avis_controller.rb
+++ b/app/controllers/instructeurs/avis_controller.rb
@@ -19,7 +19,11 @@ def revoquer
     def remind
       avis = Avis.find(params[:id])
       if avis.remind_by!(current_instructeur)
-        AvisMailer.avis_invitation(avis).deliver_later
+        if avis.expert.user.unverified_email?
+          avis.expert.user.invite_expert_and_send_avis!(avis)
+        else
+          AvisMailer.avis_invitation(avis).deliver_later
+        end
         flash.notice = "Un mail de relance a été envoyé à #{avis.expert.email}"
         redirect_back(fallback_location: avis_instructeur_dossier_path(avis.procedure, avis.dossier))
       end
diff --git a/app/controllers/users/activate_controller.rb b/app/controllers/users/activate_controller.rb
index 057f0eff57b..31bd7ef35ff 100644
--- a/app/controllers/users/activate_controller.rb
+++ b/app/controllers/users/activate_controller.rb
@@ -42,7 +42,7 @@ def confirm_email
     else
       if user.present?
         flash[:alert] = "Ce lien n'est plus valable, un nouveau lien a été envoyé à l'adresse #{user.email}"
-        User.create_or_promote_to_tiers(user.email, SecureRandom.hex)
+        user.resend_confirmation_email!
       else
         flash[:alert] = "Un problème est survenu, vous pouvez nous contacter sur #{Current.contact_email}"
       end
diff --git a/app/mailers/avis_mailer.rb b/app/mailers/avis_mailer.rb
index 58d5bcaad67..d3018920b9f 100644
--- a/app/mailers/avis_mailer.rb
+++ b/app/mailers/avis_mailer.rb
@@ -22,6 +22,25 @@ def avis_invitation(avis, targeted_user_link = nil) # ensure re-entrance if exis
     end
   end
 
+  def avis_invitation_and_confirm_email(user, token, avis, targeted_user_link = nil) # ensure re-entrance if existing AvisMailer.avis_invitation in queue
+    if avis.dossier.visible_by_administration?
+      targeted_user_link = avis.targeted_user_links
+        .find_or_create_by(target_context: 'avis',
+                                                  target_model_type: Avis.name,
+                                                  target_model_id: avis.id,
+                                                  user: avis.expert.user)
+      email = user.email
+      @token = token
+      @avis = avis
+      @url = targeted_user_link_url(targeted_user_link)
+      subject = "Donnez votre avis sur le dossier nº #{@avis.dossier.id} (#{@avis.dossier.procedure.libelle})"
+
+      bypass_unverified_mail_protection!
+
+      mail(to: email, subject: subject)
+    end
+  end
+
   # i18n-tasks-use t("avis_mailer.#{action}.subject")
   def notify_new_commentaire_to_expert(dossier, avis, expert)
     I18n.with_locale(dossier.user_locale) do
diff --git a/app/mailers/user_mailer.rb b/app/mailers/user_mailer.rb
index 712f2037b9f..3b1be799e6a 100644
--- a/app/mailers/user_mailer.rb
+++ b/app/mailers/user_mailer.rb
@@ -65,6 +65,20 @@ def invite_tiers(user, token, dossier)
       reply_to: Current.contact_email)
   end
 
+  def resend_confirmation_email(user, token)
+    @token = token
+    @user = user
+    subject = "Vérification de votre mail"
+
+    configure_defaults_for_user(user)
+
+    bypass_unverified_mail_protection!
+
+    mail(to: user.email,
+      subject: subject,
+      reply_to: Current.contact_email)
+  end
+
   def invite_gestionnaire(user, reset_password_token, groupe_gestionnaire)
     @reset_password_token = reset_password_token
     @user = user
diff --git a/app/models/targeted_user_link.rb b/app/models/targeted_user_link.rb
index 2f94a22c3b4..398a8b512d8 100644
--- a/app/models/targeted_user_link.rb
+++ b/app/models/targeted_user_link.rb
@@ -33,9 +33,11 @@ def redirect_url(url_helper)
         url_helper.invite_path(invite, params: { email: invite.email })
     when "avis"
       avis = target_model
-      avis.expert.user.active? ?
-        url_helper.expert_avis_path(avis.procedure, avis) :
+      if avis.expert.user.active?
+        url_helper.expert_avis_path(avis.procedure, avis)
+      else
         url_helper.sign_up_expert_avis_path(avis.procedure, avis, email: avis.expert.email)
+      end
     end
   end
 
diff --git a/app/models/user.rb b/app/models/user.rb
index 3595e81d2a3..c25b9071228 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -91,6 +91,18 @@ def invite_tiers!(dossier)
     UserMailer.invite_tiers(self, token, dossier).deliver_later
   end
 
+  def invite_expert_and_send_avis!(avis)
+    token = SecureRandom.hex(10)
+    self.update!(confirmation_token: token, confirmation_sent_at: Time.zone.now)
+    AvisMailer.avis_invitation_and_confirm_email(self, token, avis).deliver_later
+  end
+
+  def resend_confirmation_email!
+    token = SecureRandom.hex(10)
+    self.update!(confirmation_token: token, confirmation_sent_at: Time.zone.now)
+    UserMailer.resend_confirmation_email(self, token).deliver_later
+  end
+
   def invite_gestionnaire!(groupe_gestionnaire)
     UserMailer.invite_gestionnaire(self, set_reset_password_token, groupe_gestionnaire).deliver_later
   end
@@ -163,13 +175,11 @@ def self.create_or_promote_to_administrateur(email, password)
 
   def self.create_or_promote_to_expert(email, password)
     user = User
-      .create_with(password: password, confirmed_at: Time.zone.now, email_verified_at: Time.zone.now)
+      .create_with(password: password, confirmed_at: Time.zone.now)
       .find_or_create_by(email: email)
 
-    if user.valid?
-      if user.expert.nil?
-        user.create_expert!
-      end
+    if user.valid? && user.expert.nil?
+      user.create_expert!
     end
 
     user
diff --git a/app/views/avis_mailer/avis_invitation.html.haml b/app/views/avis_mailer/avis_invitation.html.haml
index e4bb0db961f..262029b0d88 100644
--- a/app/views/avis_mailer/avis_invitation.html.haml
+++ b/app/views/avis_mailer/avis_invitation.html.haml
@@ -22,11 +22,7 @@
 %p{ style: "padding: 8px; color: #333333; background-color: #EEEEEE; font-size: 14px;" }
   = @avis.introduction
 
-- if @avis.expert.user.active?.present?
-  %p
-    = round_button("Donner votre avis", @url, :primary)
-- else
-  %p
-    = round_button("Inscrivez-vous pour donner votre avis", @url, :primary)
+%p
+  = round_button("Donner votre avis", @url, :primary)
 
 = render partial: "layouts/mailers/signature"
diff --git a/app/views/avis_mailer/avis_invitation_and_confirm_email.html.haml b/app/views/avis_mailer/avis_invitation_and_confirm_email.html.haml
new file mode 100644
index 00000000000..aab81b4597a
--- /dev/null
+++ b/app/views/avis_mailer/avis_invitation_and_confirm_email.html.haml
@@ -0,0 +1,33 @@
+- content_for(:title, 'Invitation à donner votre avis')
+
+- content_for(:footer) do
+  Merci de ne pas répondre à cet email. Donnez votre avis
+  = link_to("sur #{Current.application_name}", @url)
+  ou
+  = succeed '.' do
+    = mail_to(@avis.claimant.email, "contactez la personne qui vous a invité")
+
+%p
+  Bonjour,
+
+%p
+  Vous avez été invité par
+  %strong= @avis.claimant.email
+  = "à donner votre avis sur le dossier nº #{@avis.dossier.id} de la démarche :"
+  %strong= @avis.procedure.libelle
+
+%p
+  = "#{@avis.claimant.email} vous a écrit :"
+  %br
+%p{ style: "padding: 8px; color: #333333; background-color: #EEEEEE; font-size: 14px;" }
+  = @avis.introduction
+
+- if @avis.expert.user.active?
+  %p
+    = round_button('Confirmez votre adresse email pour donner votre avis', users_confirm_email_url(token: @token), :primary)
+- else
+  %p
+    = round_button("Inscrivez-vous pour donner votre avis", @url, :primary)
+
+
+= render partial: "layouts/mailers/signature"
diff --git a/app/views/user_mailer/resend_confirmation_email.html.haml b/app/views/user_mailer/resend_confirmation_email.html.haml
new file mode 100644
index 00000000000..a189423c4b4
--- /dev/null
+++ b/app/views/user_mailer/resend_confirmation_email.html.haml
@@ -0,0 +1,18 @@
+- content_for(:title, "Vérification de votre mail sur #{Current.application_name}")
+
+%p
+  Bonjour,
+
+%p
+  Votre précédente confirmation de mail n'a pas fonctionné, vous pouvez essayer de nouveau en cliquant sur ce bouton :
+  = round_button 'Je confirme', users_confirm_email_url(token: @token), :primary
+
+%p
+  Vous pouvez aussi utiliser ce lien :
+  = link_to(users_confirm_email_url(token: @token), users_confirm_email_url(token: @token))
+
+%p
+  Nous restons à votre disposition si vous avez besoin d’accompagnement à l'adresse #{link_to CONTACT_EMAIL, "mailto:#{CONTACT_EMAIL}"}.
+
+
+= render partial: "layouts/mailers/signature"
diff --git a/spec/controllers/instructeurs/avis_controller_spec.rb b/spec/controllers/instructeurs/avis_controller_spec.rb
index e79b19863b9..7bd93e7426f 100644
--- a/spec/controllers/instructeurs/avis_controller_spec.rb
+++ b/spec/controllers/instructeurs/avis_controller_spec.rb
@@ -29,14 +29,14 @@
 
     describe 'remind' do
       before do
-        allow(AvisMailer).to receive(:avis_invitation).and_return(double(deliver_later: nil))
+        allow(AvisMailer).to receive(:avis_invitation_and_confirm_email).and_return(double(deliver_later: nil))
       end
       context 'without question' do
         let!(:avis) { create(:avis, dossier: dossier, claimant: instructeur, experts_procedure: experts_procedure) }
 
         it 'sends a reminder to the expert' do
           get :remind, params: { procedure_id: procedure.id, id: avis.id }
-          expect(AvisMailer).to have_received(:avis_invitation).once.with(avis)
+          expect(AvisMailer).to have_received(:avis_invitation_and_confirm_email)
           expect(flash.notice).to eq("Un mail de relance a été envoyé à #{avis.expert.email}")
           expect(avis.reload.reminded_at).to be_present
         end
@@ -47,7 +47,7 @@
 
         it 'sends a reminder to the expert' do
           get :remind, params: { procedure_id: procedure.id, id: avis.id }
-          expect(AvisMailer).to have_received(:avis_invitation).once.with(avis)
+          expect(AvisMailer).to have_received(:avis_invitation_and_confirm_email)
           expect(flash.notice).to eq("Un mail de relance a été envoyé à #{avis.expert.email}")
           expect(avis.reload.reminded_at).to be_present
         end
diff --git a/spec/controllers/users/activate_controller_spec.rb b/spec/controllers/users/activate_controller_spec.rb
index d134670d86e..bfbd7ef66f5 100644
--- a/spec/controllers/users/activate_controller_spec.rb
+++ b/spec/controllers/users/activate_controller_spec.rb
@@ -83,7 +83,7 @@
       end
 
       it 'redirects to root path with an explanation notice and it send a new link if user present' do
-        expect { subject }.to have_enqueued_mail(UserMailer, :invite_tiers)
+        expect { subject }.to have_enqueued_mail(UserMailer, :resend_confirmation_email)
         expect(response).to redirect_to(root_path(user))
         expect(flash[:alert]).to eq("Ce lien n'est plus valable, un nouveau lien a été envoyé à l'adresse #{user.email}")
       end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 75c74381478..8e33e8951ea 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -193,7 +193,7 @@
         user = subject
         expect(user.valid_password?(password)).to be true
         expect(user.confirmed_at).to be_present
-        expect(user.email_verified_at).to be_present
+        expect(user.email_verified_at).to be_nil
         expect(user.expert).to be_present
       end
     end