diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 9fd693f..d10746f 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -30,8 +30,12 @@ class ApplicationController < ActionController::Base
   def user_not_authorized(exception)
     policy_name = exception.policy.class.to_s.underscore
 
-    flash[:error] = t "#{policy_name}.#{exception.query}", scope: "pundit", default: :default
-    redirect_back_or_to(root_path)
+    if current_user
+      flash[:error] = t "#{policy_name}.#{exception.query}", scope: "pundit", default: :default
+      redirect_back_or_to(root_path)
+    else
+      not_found
+    end
   end
 
   def not_found
diff --git a/app/controllers/contests_controller.rb b/app/controllers/contests_controller.rb
index 6c3e9c3..17ecc01 100644
--- a/app/controllers/contests_controller.rb
+++ b/app/controllers/contests_controller.rb
@@ -1,6 +1,7 @@
 class ContestsController < ApplicationController
   before_action :set_contest, only: %i[ destroy edit show update ]
-  skip_before_action :require_authentication, only: %i[ scoreboard offline_new ]
+  before_action :offline_setup, only: %i[ offline_new offline_create ]
+  skip_before_action :require_authentication, only: %i[ scoreboard offline_new offline_create ]
 
   def index
     authorize :contest
@@ -100,22 +101,30 @@ class ContestsController < ApplicationController
   end
 
   def offline_new
-    @contest = Contest.find_by(slug: params[:id])
-    unless @contest && @contest.offline_form
-      skip_authorization
-      not_found and return
-    end
-    authorize :contest
-
-    I18n.locale = @contest.lang
-
-    @title = I18n.t("contests.scoreboard.title", name: @contest.name)
-
+    authorize @contest
     @offline = Offline.new
   end
 
+  def offline_create
+    authorize @contest
+    @offline = Offline.new(offline_start_params)
+    @offline.contest = @contest
+    @offline.start_time = Time.now()
+    if @offline.save
+      redirect_to "/public/#{@contest.friendly_id}/offline/test"
+    else
+      render :offline_new, status: :unprocessable_entity
+    end
+  end
+
   private
 
+  def offline_setup
+    @contest = Contest.find_by(slug: params[:id])
+    I18n.locale = @contest.lang
+    @title = I18n.t("contests.scoreboard.title", name: @contest.name)
+  end
+
   def set_badges
     @badges = []
     @badges.push(t("helpers.badges.team")) if @contest.team
@@ -139,4 +148,8 @@ class ContestsController < ApplicationController
       end
     end
   end
+
+  def offline_start_params
+    params.expect(offline: [ :name, :start_image ])
+  end
 end
diff --git a/app/models/offline.rb b/app/models/offline.rb
index f0ad1ad..f140626 100644
--- a/app/models/offline.rb
+++ b/app/models/offline.rb
@@ -4,6 +4,7 @@
 #
 #  id         :integer          not null, primary key
 #  end_time   :datetime
+#  name       :string           not null
 #  start_time :datetime         not null
 #  created_at :datetime         not null
 #  updated_at :datetime         not null
@@ -23,5 +24,17 @@ class Offline < ApplicationRecord
   has_one_attached :start_image
   has_one_attached :end_image
 
+  validates :name, presence: true
   validates :start_time, presence: true
+
+  validate :start_image_is_present
+
+  def start_image_is_present
+    logger = Logger.new(STDOUT)
+    logger.info "TESTddfzefzef"
+    logger.info self.start_image.attached?
+    if !self.start_image.attached?
+      errors.add(:start_image, I18n.t("activerecord.errors.models.offline.attributes.start_image.blank"))
+    end
+  end
 end
diff --git a/app/policies/contest_policy.rb b/app/policies/contest_policy.rb
index 5e6a300..c435e3a 100644
--- a/app/policies/contest_policy.rb
+++ b/app/policies/contest_policy.rb
@@ -47,24 +47,28 @@ class ContestPolicy < ApplicationPolicy
     record.user.id == user.id || user.admin?
   end
 
+  def offline?
+    record.offline_form
+  end
+
   def offline_new?
-    true
+    offline?
   end
 
   def offline_create?
-    true
+    offline?
   end
 
   def offline_edit?
-    true
+    offline?
   end
 
   def offline_update?
-    true
+    offline?
   end
 
   def scoreboard?
-    true
+    record.public
   end
 
   def upload_csv?
diff --git a/app/views/contests/offline_new.html.slim b/app/views/contests/offline_new.html.slim
index 5d85d2d..bcf422f 100644
--- a/app/views/contests/offline_new.html.slim
+++ b/app/views/contests/offline_new.html.slim
@@ -1,8 +1,13 @@
-= form_with model: @offline, url: "/public/#{@contest.id}/offline" do |form|
+= form_with model: @offline, url: "/public/#{@contest.friendly_id}/offline" do |form|
+  .row.mb-3
+    .col
+      .form-floating
+        = form.text_field :name, autocomplete: "off", class: "form-control"
+        = form.label :name, class: "required"
   .row.mb-3
     .col
       .form-text.mb-1
-        = t("puzzles.image_select")
+        = t("offlines.start_image_select")
       = form.file_field :start_image, accept: "image/*", class: "form-control"
       .form-text.error-message style="display: none;" id="image-error-message"
         = t("puzzles.form.file_too_big")
@@ -20,6 +25,6 @@
         }
 
         setMaxUploadSize();
-  .row.mt-3
+  .row.mt-4
     .col
-      = form.submit t("helpers.buttons.add"), class: "btn btn-primary"
\ No newline at end of file
+      = form.submit t("helpers.buttons.start"), class: "btn btn-primary"
\ No newline at end of file
diff --git a/config/initializers/form_errors.rb b/config/initializers/form_errors.rb
index a95e2c6..3c26046 100644
--- a/config/initializers/form_errors.rb
+++ b/config/initializers/form_errors.rb
@@ -1,5 +1,5 @@
 ActionView::Base.field_error_proc = proc do |html_tag, instance|
-  if html_tag.include? "<label"
+  if (html_tag.include? "<label") || (html_tag.include? "<input accept=\"image")
     appended_html = ""
     if instance.error_message.is_a?(Array)
       appended_html = "<div class='error-message form-text'>#{instance.error_message.map(&:capitalize).uniq.join(", ")}</div>"
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 04a90ba..aed4394 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -74,6 +74,8 @@ en:
         processed: Processed?
         text: Content
         time: Time
+      offline:
+        name: Your name
       puzzle:
         brand: Brand
         image: Image
@@ -112,6 +114,12 @@ en:
               blank: "No file selected"
               empty: "This file is empty"
               not_a_csv_file: "it must be a CSV file"
+        offline:
+          attributes:
+            name:
+              blank: Please enter a name for your participation
+            start_image:
+              blank: Please upload an image
         puzzle:
           attributes:
             name:
@@ -216,6 +224,7 @@ en:
       refresh: Refresh
       sign_in: Sign in
       save: Save
+      start: Click here to start your participation
     field: Field
     none: No field selected
     rank: Rank
@@ -232,6 +241,8 @@ en:
     home: My contests
     settings: Settings
     log_out: Log out
+  offlines:
+    start_image_select: Enter your photo of the puzzle with the provided code written on a paper before starting it
   puzzles:
     destroy:
       notice: Puzzle deleted
diff --git a/config/locales/fr.yml b/config/locales/fr.yml
index f3ad669..d21a2b2 100644
--- a/config/locales/fr.yml
+++ b/config/locales/fr.yml
@@ -45,6 +45,8 @@ fr:
         processed: Traité ?
         text: Contenu
         time: Temps
+      offline:
+        name: Ton nom ou pseudo
       puzzle:
         brand: Marque
         image: Image
@@ -83,6 +85,12 @@ fr:
               blank: "Aucun fichier sélectionné"
               empty: "Ce fichier est vide"
               not_a_csv_file: "Le fichier doit être au format CSV"
+        offline:
+          attributes:
+            name:
+              blank: Tu dois entrer un nom pour pouvoir participer
+            start_image:
+              blank: Tu dois inclure cette image pour pouvoir participer
         puzzle:
           attributes:
             name:
@@ -187,6 +195,7 @@ fr:
       refresh: Rafraîchir
       sign_in: Se connecter
       save: Modifier
+      start: Clique ici pour démarrer ta participation
     field: Champ
     none: Aucun champ sélectionné
     rank: Rang
@@ -203,6 +212,8 @@ fr:
     home: Mes concours
     settings: Paramètres
     log_out: Déconnexion
+  offlines:
+    start_image_select: Prends une photo du puzzle avant de le commencer, avec le code donné par l'organisateur.ice écrit sur du papier
   puzzles:
     destroy:
       notice: Puzzle supprimé
diff --git a/db/migrate/20251030094151_add_name_to_offline.rb b/db/migrate/20251030094151_add_name_to_offline.rb
new file mode 100644
index 0000000..9d47ea0
--- /dev/null
+++ b/db/migrate/20251030094151_add_name_to_offline.rb
@@ -0,0 +1,5 @@
+class AddNameToOffline < ActiveRecord::Migration[8.0]
+  def change
+    add_column :offlines, :name, :string, null: false
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 0f4b1a0..40d6dbb 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2025_10_30_092221) do
+ActiveRecord::Schema[8.0].define(version: 2025_10_30_094151) do
   create_table "active_storage_attachments", force: :cascade do |t|
     t.string "name", null: false
     t.string "record_type", null: false
@@ -132,6 +132,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_10_30_092221) do
     t.integer "contest_id", null: false
     t.datetime "start_time", null: false
     t.datetime "end_time"
+    t.string "name", null: false
     t.index ["contest_id"], name: "index_offlines_on_contest_id"
   end
 
diff --git a/spec/factories/offlines.rb b/spec/factories/offlines.rb
index dc0c4b7..baabcfb 100644
--- a/spec/factories/offlines.rb
+++ b/spec/factories/offlines.rb
@@ -4,6 +4,7 @@
 #
 #  id         :integer          not null, primary key
 #  end_time   :datetime
+#  name       :string           not null
 #  start_time :datetime         not null
 #  created_at :datetime         not null
 #  updated_at :datetime         not null
diff --git a/spec/models/offline_spec.rb b/spec/models/offline_spec.rb
index 913ae79..853bb59 100644
--- a/spec/models/offline_spec.rb
+++ b/spec/models/offline_spec.rb
@@ -4,6 +4,7 @@
 #
 #  id         :integer          not null, primary key
 #  end_time   :datetime
+#  name       :string           not null
 #  start_time :datetime         not null
 #  created_at :datetime         not null
 #  updated_at :datetime         not null