diff --git a/app/controllers/concerns/create_avis_concern.rb b/app/controllers/concerns/create_avis_concern.rb
index ad29b06c0..47a51c1f2 100644
--- a/app/controllers/concerns/create_avis_concern.rb
+++ b/app/controllers/concerns/create_avis_concern.rb
@@ -60,7 +60,11 @@ module CreateAvisConcern
         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 c7f3bfde4..d0d238b4f 100644
--- a/app/controllers/experts/avis_controller.rb
+++ b/app/controllers/experts/avis_controller.rb
@@ -144,6 +144,7 @@ module Experts
 
       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 9f5cb46b2..3fd9f75b3 100644
--- a/app/controllers/instructeurs/avis_controller.rb
+++ b/app/controllers/instructeurs/avis_controller.rb
@@ -17,7 +17,11 @@ module Instructeurs
     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/mailers/avis_mailer.rb b/app/mailers/avis_mailer.rb
index 1efa8116f..702420253 100644
--- a/app/mailers/avis_mailer.rb
+++ b/app/mailers/avis_mailer.rb
@@ -20,6 +20,25 @@ class AvisMailer < ApplicationMailer
     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/models/targeted_user_link.rb b/app/models/targeted_user_link.rb
index 2d3d53660..a2d41a8d5 100644
--- a/app/models/targeted_user_link.rb
+++ b/app/models/targeted_user_link.rb
@@ -31,9 +31,11 @@ class TargetedUserLink < ApplicationRecord
         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 ee80ce46a..cb7234590 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -89,6 +89,12 @@ class User < ApplicationRecord
     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 invite_gestionnaire!(groupe_gestionnaire)
     UserMailer.invite_gestionnaire(self, set_reset_password_token, groupe_gestionnaire).deliver_later
   end
@@ -161,13 +167,11 @@ class User < ApplicationRecord
 
   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 e4bb0db96..262029b0d 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 000000000..ce4db376a
--- /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("Confirmer le mail pour donner votre avis", @url, :primary)
+- else
+  %p
+    = round_button("Inscrivez-vous pour donner votre avis", @url, :primary)
+
+
+= render partial: "layouts/mailers/signature"