diff --git a/app/jobs/clear_duplicated_half_signup_users_job.rb b/app/jobs/clear_duplicated_half_signup_users_job.rb
new file mode 100644
index 0000000000..ce30bebeb3
--- /dev/null
+++ b/app/jobs/clear_duplicated_half_signup_users_job.rb
@@ -0,0 +1,84 @@
+# frozen_string_literal: true
+
+# rubocop:disable Rails/Output
+class ClearDuplicatedHalfSignupUsersJob < ApplicationJob
+  include Decidim::Logging
+
+  def perform
+    duplicated_numbers = find_duplicated_phone_numbers
+    return puts("No duplicated phone numbers found") if duplicated_numbers.empty?
+
+    duplicated_numbers.each do |phone_info|
+      phone_number, phone_country = phone_info
+
+      users_with_phone = Decidim::User.where(phone_number: phone_number, phone_country: phone_country)
+      quick_auth_users = users_with_phone.select { |user| user.email.include?("quick_auth") }
+      other_users = users_with_phone.reject { |user| user.email.include?("quick_auth") }
+
+      quick_auth_users.each { |user| soft_delete_user(user, "Duplicated account") }
+
+      alert_about_duplicated_numbers(phone_number, other_users) if other_users.map(&:email).uniq.size > 1
+    end
+  end
+
+  private
+
+  def find_duplicated_phone_numbers
+    Decidim::User
+      .where.not(phone_number: [nil, ""])
+      .where.not(phone_country: [nil, ""])
+      .group(:phone_number, :phone_country)
+      .having("count(*) > 1")
+      .pluck(:phone_number, :phone_country)
+  end
+
+  def soft_delete_user(user, reason)
+    if user.email.include?("quick_auth")
+      user.update(phone_number: nil, phone_country: nil)
+
+      form = Decidim::DeleteAccountForm.from_params(delete_reason: reason)
+      previous_email = user.email
+      Decidim::DestroyAccount.call(user, form) do
+        on(:ok) do
+          log!("User #{user.id} (#{previous_email}) has been deleted", :info)
+          puts("User #{user.id} (#{previous_email}) has been deleted")
+        end
+        on(:invalid) do
+          log!("Failed to delete user #{user.id} (#{user.email}): #{form.errors.full_messages}", :warn)
+          puts("Failed to delete user #{user.id} (#{user.email}): #{form.errors.full_messages}")
+        end
+      end
+    else
+      log!("Not a Quick Auth account, skipping deletion", :info)
+      puts("Not a Quick Auth account, skipping deletion")
+    end
+  end
+
+  def alert_about_duplicated_numbers(phone_number, users)
+    obfuscated_number = obfuscate_phone_number(phone_number)
+    emails = users.map(&:email)
+    email_pairs = emails.each_slice(2).map { |pair| pair.join(" | ") }
+
+    message = <<~MSG
+      \nALERT: Duplicated Phone Number Detected!
+
+      Phone Number: #{obfuscated_number}
+      Users with this number:
+      #{email_pairs.join("\n")}
+    MSG
+
+    log!(message, :warn)
+    puts(message)
+  end
+
+  def obfuscate_phone_number(phone_number)
+    return "No phone number" if phone_number.blank?
+
+    visible_prefix = phone_number[0..1]
+    visible_suffix = phone_number[-2..]
+    obfuscated_middle = "*" * (phone_number.length - 4)
+
+    visible_prefix + obfuscated_middle + visible_suffix
+  end
+end
+# rubocop:enable Rails/Output
diff --git a/lib/tasks/clear_duplicated_users.rake b/lib/tasks/clear_duplicated_users.rake
new file mode 100644
index 0000000000..dcccdfe3e8
--- /dev/null
+++ b/lib/tasks/clear_duplicated_users.rake
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+namespace :decidim do
+  desc "Clear duplicated users with the same phone_numbers in the database"
+  task clear_duplicated_users: :environment do
+    ClearDuplicatedHalfSignupUsersJob.perform_now
+  end
+end
diff --git a/spec/jobs/clear_duplicated_half_signup_users_job_spec.rb b/spec/jobs/clear_duplicated_half_signup_users_job_spec.rb
new file mode 100644
index 0000000000..a3fc2533e3
--- /dev/null
+++ b/spec/jobs/clear_duplicated_half_signup_users_job_spec.rb
@@ -0,0 +1,140 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+module Decidim
+  describe ClearDuplicatedHalfSignupUsersJob do
+    let!(:user1) { create(:user, phone_number: "1234567890", phone_country: "US", email: "user1@example.com") }
+    let!(:user2) { create(:user, phone_number: "1234567890", phone_country: "US", email: "quick_auth_user@example.com") }
+    let!(:user3) { create(:user, phone_number: "1234567890", phone_country: "US", email: "user3@example.com") }
+    let!(:user4) { create(:user, phone_number: "9876543210", phone_country: "US", email: "user4@example.com") }
+
+    before do
+      allow_any_instance_of(Decidim::DestroyAccount).to receive(:call).and_return(true)
+    end
+
+    describe "#perform" do
+      context "when no duplicated phone numbers are found" do
+        it "prints that no duplicated phone numbers are found" do
+          allow_any_instance_of(ClearDuplicatedHalfSignupUsersJob).to receive(:find_duplicated_phone_numbers).and_return([])
+
+          expect { ClearDuplicatedHalfSignupUsersJob.perform_now }.to output(/No duplicated phone numbers found/).to_stdout
+        end
+      end
+
+      context "when duplicated phone numbers are found" do
+        before do
+          user1
+          user2
+          user3
+        end
+
+        it "soft deletes quick_auth users" do
+          expect_any_instance_of(ClearDuplicatedHalfSignupUsersJob).to receive(:soft_delete_user).with(user2, "Duplicated account")
+
+          ClearDuplicatedHalfSignupUsersJob.perform_now
+        end
+
+        it "alerts about duplicated phone numbers for non-quick_auth users" do
+          expect(Rails.logger).to receive(:warn).with(/ALERT: Duplicated Phone Number Detected/)
+
+          ClearDuplicatedHalfSignupUsersJob.perform_now
+        end
+
+        it "does not soft delete non quick_auth users" do
+          expect_any_instance_of(ClearDuplicatedHalfSignupUsersJob).not_to receive(:soft_delete_user).with(user1, "Duplicated account")
+
+          ClearDuplicatedHalfSignupUsersJob.perform_now
+        end
+
+        it "does not soft delete users with different phone numbers" do
+          expect_any_instance_of(ClearDuplicatedHalfSignupUsersJob).not_to receive(:soft_delete_user).with(user4, "Duplicated account")
+
+          ClearDuplicatedHalfSignupUsersJob.perform_now
+        end
+      end
+    end
+
+    describe "#soft_delete_user" do
+      let(:user) { create(:user, phone_number: "1234567890", phone_country: "US", email: "quick_auth_user@example.com") }
+
+      it "updates the user to nullify the phone number and country" do
+        expect(user).to receive(:update).with(phone_number: nil, phone_country: nil)
+
+        subject.send(:soft_delete_user, user, "Duplicated account")
+      end
+
+      it "calls the Decidim::DestroyAccount service to delete the user" do
+        allow_any_instance_of(Decidim::DestroyAccount).to receive(:call).and_return(true)
+
+        subject.send(:soft_delete_user, user, "Duplicated account")
+      end
+
+      it "does not delete a non-quick_auth account" do
+        user_with_diff_email = create(:user, phone_number: "1234567890", phone_country: "US", email: "user_diff@example.com")
+
+        expect_any_instance_of(Decidim::DestroyAccount).not_to receive(:call)
+        expect(Rails.logger).to receive(:info).with(/Not a Quick Auth account, skipping deletion/)
+
+        subject.send(:soft_delete_user, user_with_diff_email, "Duplicated account")
+      end
+    end
+
+    describe "#alert_about_duplicated_numbers" do
+      let(:users) { [user1, user2, user3] }
+
+      it "obfuscates the phone number and logs an alert message" do
+        obfuscated_number = "12****90"
+        allow(subject).to receive(:obfuscate_phone_number).with("1234567890").and_return(obfuscated_number)
+        expect(Rails.logger).to receive(:warn).with(/ALERT: Duplicated Phone Number Detected/)
+
+        subject.send(:alert_about_duplicated_numbers, "1234567890", users)
+      end
+
+      it "logs the correct message with the obfuscated phone number" do
+        obfuscated_number = "12****90"
+        allow(subject).to receive(:obfuscate_phone_number).with("1234567890").and_return(obfuscated_number)
+
+        allow(Rails.logger).to receive(:warn) { |message|
+          expect(message).to include("Phone Number: #{obfuscated_number}")
+        }
+
+        subject.send(:alert_about_duplicated_numbers, "1234567890", users)
+      end
+    end
+
+    describe "#obfuscate_phone_number" do
+      it "returns an obfuscated phone number with visible prefix and suffix" do
+        result = subject.send(:obfuscate_phone_number, "1234567890")
+
+        expect(result).to eq("12******90")
+      end
+
+      it 'returns "No phone number" if the phone number is blank' do
+        result = subject.send(:obfuscate_phone_number, "")
+
+        expect(result).to eq("No phone number")
+      end
+
+      it 'returns "No phone number" when given nil' do
+        result = subject.send(:obfuscate_phone_number, nil)
+
+        expect(result).to eq("No phone number")
+      end
+    end
+
+    describe "#find_duplicated_phone_numbers" do
+      context "when there are duplicates" do
+        it "finds duplicated phone numbers" do
+          user1
+          user2
+          user3
+
+          result = subject.send(:find_duplicated_phone_numbers)
+
+          expect(result).to include(%w(1234567890 US))
+        end
+      end
+    end
+  end
+end