diff --git a/Gemfile b/Gemfile
index 87ef005..0143936 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,6 +16,7 @@ gem "decidim", "~> #{DECIDIM_VERSION}.0"
 # External Decidim gems
 gem "decidim-cache_cleaner"
 gem "decidim-decidim_awesome", git: "https://github.com/octree-gva/decidim-module-decidim_awesome.git", branch: "feat/awesome_decidim_private_fields"
+gem "decidim-extra_user_fields", git: "https://github.com/OpenSourcePolitics/decidim-module-extra_user_fields.git", branch: DECIDIM_BRANCH
 gem "decidim-friendly_signup", git: "https://github.com/OpenSourcePolitics/decidim-module-friendly_signup.git"
 gem "decidim-spam_detection"
 gem "decidim-term_customizer", git: "https://github.com/opensourcepolitics/decidim-module-term_customizer.git", branch: "fix/multi-threading-compliant"
diff --git a/Gemfile.lock b/Gemfile.lock
index a7ef9b0..6193c24 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,3 +1,13 @@
+GIT
+  remote: https://github.com/OpenSourcePolitics/decidim-module-extra_user_fields.git
+  revision: 25f5a7843a38a5f9360f9bd42eb7e246d997bc7b
+  branch: release/0.27-stable
+  specs:
+    decidim-extra_user_fields (0.27.2)
+      country_select (~> 9.0)
+      decidim-core (>= 0.27.0, < 0.28)
+      deface (~> 1.5)
+
 GIT
   remote: https://github.com/OpenSourcePolitics/decidim-module-friendly_signup.git
   revision: 1c91e024ae4467c097b39673e5d78b06afd206d1
@@ -198,6 +208,10 @@ GEM
     commonmarker (0.23.10)
     concurrent-ruby (1.2.3)
     connection_pool (2.4.1)
+    countries (6.0.1)
+      unaccent (~> 0.3)
+    country_select (9.0.0)
+      countries (> 5.0, < 7.0)
     crack (1.0.0)
       bigdecimal
       rexml
@@ -882,6 +896,7 @@ GEM
     uber (0.1.0)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
+    unaccent (0.4.0)
     unicode-display_width (2.5.0)
     uri (0.13.0)
     valid_email2 (2.3.1)
@@ -951,6 +966,7 @@ DEPENDENCIES
   decidim-cache_cleaner
   decidim-decidim_awesome!
   decidim-dev (~> 0.27.0)
+  decidim-extra_user_fields!
   decidim-friendly_signup!
   decidim-spam_detection
   decidim-term_customizer!
diff --git a/app/commands/concerns/decidim/extra_user_fields/create_registrations_commands_overrides.rb b/app/commands/concerns/decidim/extra_user_fields/create_registrations_commands_overrides.rb
new file mode 100644
index 0000000..68dfbe5
--- /dev/null
+++ b/app/commands/concerns/decidim/extra_user_fields/create_registrations_commands_overrides.rb
@@ -0,0 +1,74 @@
+# frozen_string_literal: true
+
+require "active_support/concern"
+
+module Decidim
+  module ExtraUserFields
+    # Changes in methods to store extra fields in user profile
+    module CreateRegistrationsCommandsOverrides
+      extend ActiveSupport::Concern
+
+      def call
+        return broadcast(:invalid) if same_email_representative?
+
+        if form.invalid?
+
+          user = User.has_pending_invitations?(form.current_organization.id, form.email)
+          user.invite!(user.invited_by) if user
+          return broadcast(:invalid)
+        end
+
+        create_user
+        send_email_to_statutory_representative
+
+        broadcast(:ok, @user)
+      rescue ActiveRecord::RecordInvalid
+        broadcast(:invalid)
+      end
+
+      private
+
+      def create_user
+        @user = User.create!(
+          email: form.email,
+          name: form.name,
+          nickname: form.nickname,
+          password: form.password,
+          password_confirmation: form.password_confirmation,
+          password_updated_at: Time.current,
+          organization: form.current_organization,
+          tos_agreement: form.tos_agreement,
+          newsletter_notifications_at: form.newsletter_at,
+          accepted_tos_version: form.current_organization.tos_version,
+          locale: form.current_locale,
+          extended_data: extended_data
+        )
+      end
+
+      def extended_data
+        @extended_data ||= (@user&.extended_data || {}).merge(
+          country: form.country,
+          postal_code: form.postal_code,
+          date_of_birth: form.date_of_birth,
+          gender: form.gender,
+          phone_number: form.phone_number,
+          location: form.location,
+          underage: form.underage,
+          statutory_representative_email: form.statutory_representative_email
+        )
+      end
+
+      def send_email_to_statutory_representative
+        return if form.statutory_representative_email.blank? || !form.underage
+
+        Decidim::ExtraUserFields::StatutoryRepresentativeMailer.inform(@user).deliver_now
+      end
+
+      def same_email_representative?
+        return false if form.statutory_representative_email.blank?
+
+        form.statutory_representative_email == form.email
+      end
+    end
+  end
+end
diff --git a/db/migrate/20240717094815_add_extra_user_fields_to_decidim_organization.decidim_extra_user_fields.rb b/db/migrate/20240717094815_add_extra_user_fields_to_decidim_organization.decidim_extra_user_fields.rb
new file mode 100644
index 0000000..6a19d4a
--- /dev/null
+++ b/db/migrate/20240717094815_add_extra_user_fields_to_decidim_organization.decidim_extra_user_fields.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+# This migration comes from decidim_extra_user_fields (originally 20221024121407)
+
+class AddExtraUserFieldsToDecidimOrganization < ActiveRecord::Migration[6.0]
+  def up
+    add_column :decidim_organizations, :extra_user_fields, :jsonb, default: { "enabled" => false }
+  end
+
+  def down
+    remove_column :decidim_organizations, :extra_user_fields, :jsonb
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 88170bf..7365e04 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1091,6 +1091,7 @@
     t.string "machine_translation_display_priority", default: "original", null: false
     t.string "external_domain_whitelist", default: [], array: true
     t.boolean "enable_participatory_space_filters", default: true
+    t.jsonb "extra_user_fields", default: {"enabled"=>false}
     t.index ["host"], name: "index_decidim_organizations_on_host", unique: true
     t.index ["name"], name: "index_decidim_organizations_on_name", unique: true
     t.index ["secondary_hosts"], name: "index_decidim_organizations_on_secondary_hosts"
diff --git a/spec/commands/decidim/create_registration_spec.rb b/spec/commands/decidim/create_registration_spec.rb
new file mode 100644
index 0000000..74224b8
--- /dev/null
+++ b/spec/commands/decidim/create_registration_spec.rb
@@ -0,0 +1,190 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+module Decidim
+  module Comments
+    describe CreateRegistration do
+      describe "call" do
+        let(:organization) { create(:organization) }
+
+        let(:name) { "Username" }
+        let(:nickname) { "nickname" }
+        let(:email) { "user@example.org" }
+        let(:password) { "Y1fERVzL2F" }
+        let(:password_confirmation) { password }
+        let(:tos_agreement) { "1" }
+        let(:current_locale) { "fr" }
+        let(:country) { "Argentina" }
+        let(:date_of_birth) { "01/01/2000" }
+        let(:gender) { "Other" }
+        let(:location) { "Paris" }
+        let(:phone_number) { "0123456789" }
+        let(:postal_code) { "75001" }
+        let(:newsletter_notifications_at) { nil }
+        let(:notifications_sending_frequency) { "daily" }
+        let(:underage) { false }
+        let(:statutory_representative_email) { nil }
+        let(:extended_data) do
+          {
+            country: country,
+            date_of_birth: date_of_birth,
+            gender: gender,
+            location: location,
+            phone_number: phone_number,
+            postal_code: postal_code,
+            underage: underage,
+            statutory_representative_email: statutory_representative_email
+          }
+        end
+
+        let(:form_params) do
+          {
+            "user" => {
+              "name" => name,
+              "nickname" => nickname,
+              "email" => email,
+              "password" => password,
+              "password_confirmation" => password_confirmation,
+              "tos_agreement" => tos_agreement,
+              "country" => country,
+              "postal_code" => postal_code,
+              "date_of_birth" => date_of_birth,
+              "gender" => gender,
+              "phone_number" => phone_number,
+              "location" => location,
+              "underage" => underage,
+              "statutory_representative_email" => statutory_representative_email
+            }
+          }
+        end
+        let(:form) do
+          RegistrationForm.from_params(
+            form_params,
+            current_locale: current_locale
+          ).with_context(
+            current_organization: organization
+          )
+        end
+        let(:command) { described_class.new(form) }
+
+        describe "when the form is not valid" do
+          before do
+            allow(form).to receive(:invalid?).and_return(true)
+          end
+
+          it "broadcasts invalid" do
+            expect { command.call }.to broadcast(:invalid)
+          end
+
+          it "doesn't create a user" do
+            expect do
+              command.call
+            end.not_to change(User, :count)
+          end
+
+          context "when the user was already invited" do
+            let(:user) { build(:user, email: email, organization: organization) }
+
+            before do
+              user.invite!
+              clear_enqueued_jobs
+            end
+
+            RSpec::Matchers.define_negated_matcher :not_change, :change
+
+            it "receives the invitation email again" do
+              expect { command.call }.not_to change(User, :count)
+
+              expect do
+                command.call
+                user.reload
+              end.to not_change(User, :count)
+                .and broadcast(:invalid)
+                .and change(user.reload, :invitation_token)
+
+              expect(ActionMailer::MailDeliveryJob).to have_been_enqueued.on_queue("mailers").twice
+            end
+          end
+        end
+
+        describe "when the form is valid" do
+          it "broadcasts ok" do
+            expect { command.call }.to broadcast(:ok)
+          end
+
+          it "creates a new user" do
+            expect(User).to receive(:create!).with(
+              name: form.name,
+              nickname: form.nickname,
+              email: form.email,
+              password: form.password,
+              password_confirmation: form.password_confirmation,
+              password_updated_at: an_instance_of(ActiveSupport::TimeWithZone),
+              tos_agreement: form.tos_agreement,
+              organization: organization,
+              accepted_tos_version: organization.tos_version,
+              newsletter_notifications_at: newsletter_notifications_at,
+              locale: form.current_locale,
+              extended_data: {
+                country: country,
+                date_of_birth: Date.parse(date_of_birth),
+                gender: gender,
+                location: location,
+                phone_number: phone_number,
+                postal_code: postal_code,
+                underage: underage,
+                statutory_representative_email: statutory_representative_email
+              }
+            ).and_call_original
+
+            expect { command.call }.to change(User, :count).by(1)
+          end
+
+          it "sets the password_updated_at to the current time" do
+            expect { command.call }.to broadcast(:ok)
+            expect(User.last.password_updated_at).to be_between(2.seconds.ago, Time.current)
+          end
+
+          describe "when user keeps the newsletter unchecked" do
+            let(:newsletter) { "0" }
+
+            it "creates a user with no newsletter notifications" do
+              expect do
+                command.call
+                expect(User.last.newsletter_notifications_at).to be_nil
+              end.to change(User, :count).by(1)
+            end
+          end
+
+          describe "when the user is underage and sends a valid email" do
+            let(:underage) { true }
+            let(:statutory_representative_email) { "user@example.fr" }
+
+            it "creates a user with the statutory representative email and sends email" do
+              expect do
+                expect(Decidim::ExtraUserFields::StatutoryRepresentativeMailer).to receive(:inform).with(instance_of(Decidim::User)).and_call_original
+
+                command.call
+
+                user = User.last
+                expect(user.extended_data["statutory_representative_email"]).to eq(statutory_representative_email)
+              end.to change(User, :count).by(1)
+            end
+          end
+
+          describe "when the user is underage and tries to duplicate email" do
+            let(:underage) { true }
+            let(:statutory_representative_email) { email }
+
+            it "broadcasts invalid" do
+              expect(Decidim::ExtraUserFields::StatutoryRepresentativeMailer).not_to receive(:inform).with(instance_of(Decidim::User)).and_call_original
+
+              expect { command.call }.to broadcast(:invalid)
+            end
+          end
+        end
+      end
+    end
+  end
+end