diff --git a/app/graphql/api/v2/stored_query.rb b/app/graphql/api/v2/stored_query.rb
index a3d236f8b..1e62180da 100644
--- a/app/graphql/api/v2/stored_query.rb
+++ b/app/graphql/api/v2/stored_query.rb
@@ -294,6 +294,9 @@ class API::V2::StoredQuery
     usager {
       email
     }
+    prenomMandataire
+    nomMandataire
+    deposeParUnTiers
     connectionUsager
     groupeInstructeur {
       ...GroupeInstructeurFragment
diff --git a/app/graphql/schema.graphql b/app/graphql/schema.graphql
index cdfb5bd00..3b8198a2d 100644
--- a/app/graphql/schema.graphql
+++ b/app/graphql/schema.graphql
@@ -1416,6 +1416,7 @@ type Dossier {
   dateTraitementSVASVR: ISO8601DateTime
   demandeur: Demandeur!
   demarche: DemarcheDescriptor!
+  deposeParUnTiers: Boolean
 
   """
   L’URL du GeoJSON contenant les données cartographiques du dossier.
@@ -1427,6 +1428,7 @@ type Dossier {
   messages(id: ID): [Message!]!
   motivation: String
   motivationAttachment: File
+  nomMandataire: String
 
   """
   Le numero du dossier.
@@ -1438,6 +1440,7 @@ type Dossier {
   """
   pdf: File
   prefilled: Boolean!
+  prenomMandataire: String
   revision: Revision! @deprecated(reason: "Utilisez le champ `demarche.revision` à la place.")
 
   """
diff --git a/app/graphql/types/dossier_type.rb b/app/graphql/types/dossier_type.rb
index b0a4c7856..ac0d80bce 100644
--- a/app/graphql/types/dossier_type.rb
+++ b/app/graphql/types/dossier_type.rb
@@ -50,10 +50,14 @@ module Types
     field :attestation, Types::File, "L’URL de l’attestation au format PDF.", null: true
 
     field :usager, Types::ProfileType, "Profile de l'usager déposant le dossier", null: false
+
     field :groupe_instructeur, Types::GroupeInstructeurType, null: false
     field :revision, Types::RevisionType, null: false, deprecation_reason: 'Utilisez le champ `demarche.revision` à la place.'
 
     field :demandeur, Types::DemandeurType, null: false
+    field :prenom_mandataire, String, null: true, method: :mandataire_first_name
+    field :nom_mandataire, String, null: true, method: :mandataire_last_name
+    field :depose_par_un_tiers, Boolean, method: :for_tiers
 
     field :instructeurs, [Types::ProfileType], null: false
 
@@ -89,8 +93,8 @@ module Types
       if object.user_deleted?
         :deleted
       else
-        user_loader.then do |user|
-          if user.france_connect_information.present?
+        user_loader.then do |_user|
+          if object.user_from_france_connect?
             :france_connect
           else
             :password
diff --git a/app/models/dossier.rb b/app/models/dossier.rb
index ad78757de..76efea1a2 100644
--- a/app/models/dossier.rb
+++ b/app/models/dossier.rb
@@ -1193,7 +1193,7 @@ class Dossier < ApplicationRecord
     columns = [
       ['ID', id.to_s],
       ['Email', user_email_for(:display)],
-      ['FranceConnect ?', user.france_connect_information.present?]
+      ['FranceConnect ?', user_from_france_connect?]
     ]
 
     if procedure.for_individual?
@@ -1386,6 +1386,10 @@ class Dossier < ApplicationRecord
     "#{mandataire_first_name} #{mandataire_last_name}"
   end
 
+  def user_from_france_connect?
+    user.france_connect_information.present?
+  end
+
   private
 
   def create_missing_traitemets