diff --git a/app/helpers/avis_helper.rb b/app/helpers/avis_helper.rb
new file mode 100644
index 000000000..f9afdc76d
--- /dev/null
+++ b/app/helpers/avis_helper.rb
@@ -0,0 +1,5 @@
+module AvisHelper
+  def safe_claimant_email(claimant)
+    claimant&.email || "inconnu"
+  end
+end
diff --git a/app/views/experts/avis/instruction.html.haml b/app/views/experts/avis/instruction.html.haml
index 9e904d26b..4fd0e2205 100644
--- a/app/views/experts/avis/instruction.html.haml
+++ b/app/views/experts/avis/instruction.html.haml
@@ -7,7 +7,7 @@
     %h1.tab-title Donner votre avis
     %h2.claimant
       Demandeur :
-      %span.email= @avis.claimant.email
+      %span.email= safe_claimant_email(@avis.claimant)
       %span.date Demande d’avis envoyée le #{l(@avis.created_at, format: '%d/%m/%y')}
     %p.introduction= @avis.introduction
 
diff --git a/app/views/experts/shared/avis/_list.html.haml b/app/views/experts/shared/avis/_list.html.haml
index 256c857ee..34c5d7ad6 100644
--- a/app/views/experts/shared/avis/_list.html.haml
+++ b/app/views/experts/shared/avis/_list.html.haml
@@ -9,7 +9,7 @@
         .width-100
           %h2.claimant
             = "#{t('claimant', scope: 'activerecord.attributes.avis')} :"
-            %span.email= (avis.claimant.email == current_expert.email) ? 'Vous' : avis.claimant.email
+            %span.email= (safe_claimant_email(avis.claimant) == current_expert.email) ? 'Vous' : safe_claimant_email(avis.claimant)
             - if avis.confidentiel?
               %span.confidentiel
                 = t('confidentiel', scope: 'activerecord.attributes.avis')