diff --git a/app/controllers/admin/fraud_risk_csv_downloads_controller.rb b/app/controllers/admin/fraud_risk_csv_downloads_controller.rb
new file mode 100644
index 0000000000..c7cf4bed4e
--- /dev/null
+++ b/app/controllers/admin/fraud_risk_csv_downloads_controller.rb
@@ -0,0 +1,25 @@
+module Admin
+  class FraudRiskCsvDownloadsController < BaseAdminController
+    before_action :ensure_service_operator
+
+    def show
+      respond_to do |format|
+        format.csv do
+          send_data(csv, filename: "fraud_risk.csv")
+        end
+      end
+    end
+
+    private
+
+    def csv
+      CSV.generate do |csv|
+        csv << %w[field value]
+
+        RiskIndicator.order(created_at: :asc).pluck(:field, :value).each do |row|
+          csv << row
+        end
+      end
+    end
+  end
+end
diff --git a/app/controllers/admin/fraud_risk_csv_uploads_controller.rb b/app/controllers/admin/fraud_risk_csv_uploads_controller.rb
new file mode 100644
index 0000000000..f87bb44158
--- /dev/null
+++ b/app/controllers/admin/fraud_risk_csv_uploads_controller.rb
@@ -0,0 +1,28 @@
+module Admin
+  class FraudRiskCsvUploadsController < BaseAdminController
+    before_action :ensure_service_operator
+
+    def new
+      @form = FraudRiskCsvUploadForm.new
+    end
+
+    def create
+      @form = FraudRiskCsvUploadForm.new(fraud_risk_csv_upload_params)
+
+      if @form.save
+        redirect_to(
+          new_admin_fraud_risk_csv_upload_path,
+          notice: "Fraud prevention list uploaded successfully."
+        )
+      else
+        render :new
+      end
+    end
+
+    private
+
+    def fraud_risk_csv_upload_params
+      params.require(:admin_fraud_risk_csv_upload_form).permit(:file)
+    end
+  end
+end
diff --git a/app/forms/admin/fraud_risk_csv_upload_form.rb b/app/forms/admin/fraud_risk_csv_upload_form.rb
new file mode 100644
index 0000000000..80e5b8cfcb
--- /dev/null
+++ b/app/forms/admin/fraud_risk_csv_upload_form.rb
@@ -0,0 +1,57 @@
+module Admin
+  class FraudRiskCsvUploadForm
+    include ActiveModel::Model
+
+    attr_accessor :file
+
+    validates :file, presence: true
+
+    validate :csv_has_required_headers, if: -> { file.present? }
+
+    validate :all_records_are_valid, if: -> { file.present? && csv_has_required_headers? }
+
+    def initialize(params = {})
+      super
+    end
+
+    def save
+      return false unless valid?
+
+      ApplicationRecord.transaction do
+        RiskIndicator.where.not(id: records.map(&:id)).destroy_all
+
+        records.each(&:save!)
+      end
+
+      true
+    end
+
+    private
+
+    def csv
+      @csv ||= CSV.parse(file.read, headers: true, skip_blanks: true)
+    end
+
+    def records
+      @records ||= csv.map do |row|
+        RiskIndicator.find_or_initialize_by(row.to_h)
+      end.uniq { |record| record.attributes.slice("field", "value") }
+    end
+
+    def all_records_are_valid
+      records.select(&:invalid?).each do |record|
+        errors.add(:base, record.errors.map(&:message).join(", "))
+      end
+    end
+
+    def csv_has_required_headers
+      unless csv_has_required_headers?
+        errors.add(:base, "csv is missing required headers `field`, `value`")
+      end
+    end
+
+    def csv_has_required_headers?
+      csv.headers.include?("field") && csv.headers.include?("value")
+    end
+  end
+end
diff --git a/app/models/claim.rb b/app/models/claim.rb
index 298219227a..674306d2d3 100644
--- a/app/models/claim.rb
+++ b/app/models/claim.rb
@@ -254,7 +254,7 @@ def submittable?
   end
 
   def approvable?
-    submitted? && !held? && !payroll_gender_missing? && (!decision_made? || awaiting_qa?) && !payment_prevented_by_other_claims?
+    submitted? && !held? && !payroll_gender_missing? && (!decision_made? || awaiting_qa?) && !payment_prevented_by_other_claims? && attributes_flagged_by_risk_indicator.none?
   end
 
   def rejectable?
@@ -454,6 +454,10 @@ def awaiting_provider_verification?
     eligibility.awaiting_provider_verification?
   end
 
+  def attributes_flagged_by_risk_indicator
+    @attributes_flagged_by_risk_indicator ||= RiskIndicator.flagged_attributes(self)
+  end
+
   private
 
   def one_login_idv_name_match?
diff --git a/app/models/risk_indicator.rb b/app/models/risk_indicator.rb
new file mode 100644
index 0000000000..34614cb18a
--- /dev/null
+++ b/app/models/risk_indicator.rb
@@ -0,0 +1,34 @@
+class RiskIndicator < ApplicationRecord
+  SUPPORTED_FIELDS = %w[
+    teacher_reference_number
+    national_insurance_number
+  ].freeze
+
+  validates :field, presence: {
+    message: "'field' can't be blank"
+  }
+
+  validates :value, presence: {
+    message: "'value' can't be blank"
+  }
+
+  validates :value, uniqueness: {scope: :field}
+
+  validates :field,
+    inclusion: {
+      in: SUPPORTED_FIELDS,
+      message: "'%{value}' is not a valid attribute - must be one of #{SUPPORTED_FIELDS.join(", ")}"
+    }
+
+  def self.flagged_attributes(claim)
+    where(
+      "field = 'national_insurance_number' AND LOWER(value) = :value",
+      value: claim.national_insurance_number&.downcase
+    ).or(
+      where(
+        field: "teacher_reference_number",
+        value: claim.eligibility.try(:teacher_reference_number)
+      )
+    ).pluck(:field).compact
+  end
+end
diff --git a/app/views/admin/claims/index.html.erb b/app/views/admin/claims/index.html.erb
index ceb39ecd52..1245aafb24 100644
--- a/app/views/admin/claims/index.html.erb
+++ b/app/views/admin/claims/index.html.erb
@@ -15,6 +15,7 @@
     <%= link_to "Upload School Workforce Census data", new_admin_school_workforce_census_data_upload_path, class: "govuk-button govuk-button--secondary", data: { module: "govuk-button" }, role: :button %>
     <%= link_to "Upload TPS data", new_admin_tps_data_upload_path, class: "govuk-button govuk-button--secondary", data: { module: "govuk-button" }, role: :button %>
     <%= link_to "Upload SLC data", new_admin_student_loans_data_upload_path, class: "govuk-button govuk-button--secondary", data: { module: "govuk-button" }, role: :button %>
+    <%= link_to "Upload fraud prevention data", new_admin_fraud_risk_csv_upload_path, class: "govuk-button govuk-button--secondary", data: { module: "govuk-button" }, role: :button %>
 
     <%= render "allocations_form" %>
 
diff --git a/app/views/admin/decisions/_decision_form.html.erb b/app/views/admin/decisions/_decision_form.html.erb
index ffe191fdcf..c32f6c73b2 100644
--- a/app/views/admin/decisions/_decision_form.html.erb
+++ b/app/views/admin/decisions/_decision_form.html.erb
@@ -29,6 +29,21 @@
   </div>
 <% end %>
 
+<% if claim.attributes_flagged_by_risk_indicator.any? %>
+  <div class="govuk-warning-text">
+    <span class="govuk-warning-text__icon" aria-hidden="true">!</span>
+    <strong class="govuk-warning-text__text">
+      <span class="govuk-visually-hidden">Warning</span>
+      <p class="govuk-!-margin-top-0">
+        This claim cannot be approved because the
+        <%= @claim.attributes_flagged_by_risk_indicator.map(&:humanize).to_sentence.downcase %>
+        <%= @claim.attributes_flagged_by_risk_indicator.many? ? "are" : "is" %>
+        included on the fraud prevention list.
+      </p>
+    </strong>
+  </div>
+<% end %>
+
 <%= form_for decision, url: admin_claim_decisions_path(claim), html: { id: "claim_decision_form" } do |form| %>
   <%= hidden_field_tag :qa, params[:qa] %>
 
diff --git a/app/views/admin/fraud_risk_csv_uploads/new.html.erb b/app/views/admin/fraud_risk_csv_uploads/new.html.erb
new file mode 100644
index 0000000000..8784f19c3f
--- /dev/null
+++ b/app/views/admin/fraud_risk_csv_uploads/new.html.erb
@@ -0,0 +1,31 @@
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <h1 class="govuk-heading-xl">
+      Fraud risk CSV upload
+    </h1>
+
+    <%= form_with(
+      url: admin_fraud_risk_csv_uploads_path,
+      model: @form,
+      builder: GOVUKDesignSystemFormBuilder::FormBuilder
+    ) do |f| %>
+      <%= f.govuk_error_summary %>
+
+      <%= f.govuk_file_field(
+        :file,
+        label: { text: "Upload fraud risk CSV file" },
+        hint: {
+          text: "Currently supported attributes are #{RiskIndicator::SUPPORTED_FIELDS.join(", ")}."
+        }
+      ) %>
+
+      <%= f.govuk_submit "Upload CSV" %>
+    <% end %>
+
+    <%= govuk_link_to(
+      "Download CSV",
+      admin_fraud_risk_csv_download_path(format: :csv),
+      class: "govuk-button"
+    ) %>
+  </div>
+</div>
diff --git a/app/views/admin/tasks/index.html.erb b/app/views/admin/tasks/index.html.erb
index 597890e667..6bbf83d2c5 100644
--- a/app/views/admin/tasks/index.html.erb
+++ b/app/views/admin/tasks/index.html.erb
@@ -20,6 +20,21 @@
   </div>
 <% end %>
 
+<% if @claim.attributes_flagged_by_risk_indicator.any? %>
+  <div class="govuk-warning-text">
+    <span class="govuk-warning-text__icon" aria-hidden="true">!</span>
+    <strong class="govuk-warning-text__text">
+      <span class="govuk-visually-hidden">Warning</span>
+      <p class="govuk-!-margin-top-0">
+        This claim has been flagged as the
+        <%= @claim.attributes_flagged_by_risk_indicator.map(&:humanize).to_sentence.downcase %>
+        <%= @claim.attributes_flagged_by_risk_indicator.many? ? "are" : "is" %>
+        included on the fraud prevention list. Speak to a manager.
+      </p>
+    </strong>
+  </div>
+<% end %>
+
 <div class="govuk-grid-row">
   <%= render claim_summary_view, claim: @claim %>
 </div>
diff --git a/config/analytics_blocklist.yml b/config/analytics_blocklist.yml
index df4942ffd7..a87650d8bf 100644
--- a/config/analytics_blocklist.yml
+++ b/config/analytics_blocklist.yml
@@ -131,3 +131,9 @@
   - verification
   :journeys_sessions:
   - answers
+  :risk_indicators:
+  - id
+  - field
+  - value
+  - created_at
+  - updated_at
diff --git a/config/routes.rb b/config/routes.rb
index fb1b3ebfc4..87614e70ff 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -146,6 +146,8 @@ def matches?(request)
     resources :school_workforce_census_data_uploads, only: [:new, :create]
     resources :student_loans_data_uploads, only: [:new, :create]
     resources :tps_data_uploads, only: [:new, :create]
+    resources :fraud_risk_csv_uploads, only: [:new, :create]
+    resource :fraud_risk_csv_download, only: :show
 
     resources :payroll_runs, only: [:index, :new, :create, :show, :destroy] do
       resources :payment_confirmation_report_uploads, only: [:new, :create]
diff --git a/db/migrate/20241017160838_create_risk_indicators.rb b/db/migrate/20241017160838_create_risk_indicators.rb
new file mode 100644
index 0000000000..ff3f20cab7
--- /dev/null
+++ b/db/migrate/20241017160838_create_risk_indicators.rb
@@ -0,0 +1,12 @@
+class CreateRiskIndicators < ActiveRecord::Migration[7.0]
+  def change
+    create_table :risk_indicators, id: :uuid do |t|
+      t.string :field, null: false
+      t.string :value, null: false
+
+      t.index %i[field value], unique: true
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index fd7e4e3b8c..38d1f064e6 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[7.0].define(version: 2024_10_17_113701) do
+ActiveRecord::Schema[7.0].define(version: 2024_10_17_160838) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "citext"
   enable_extension "pg_trgm"
@@ -421,6 +421,14 @@
     t.string "itt_subject"
   end
 
+  create_table "risk_indicators", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
+    t.string "field", null: false
+    t.string "value", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["field", "value"], name: "index_risk_indicators_on_field_and_value", unique: true
+  end
+
   create_table "school_workforce_censuses", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
     t.string "teacher_reference_number"
     t.datetime "created_at", null: false
diff --git a/spec/factories/risk_indicators.rb b/spec/factories/risk_indicators.rb
new file mode 100644
index 0000000000..718880baa5
--- /dev/null
+++ b/spec/factories/risk_indicators.rb
@@ -0,0 +1,6 @@
+FactoryBot.define do
+  factory :risk_indicator do
+    field { "teacher_reference_number" }
+    value { "1234567" }
+  end
+end
diff --git a/spec/features/admin/admin_fraud_prevention_spec.rb b/spec/features/admin/admin_fraud_prevention_spec.rb
new file mode 100644
index 0000000000..146eb4825b
--- /dev/null
+++ b/spec/features/admin/admin_fraud_prevention_spec.rb
@@ -0,0 +1,110 @@
+require "rails_helper"
+
+RSpec.feature "Admin fraud prevention" do
+  let(:fraud_risk_csv) do
+    File.open(Rails.root.join("spec", "fixtures", "files", "fraud_risk.csv"))
+  end
+
+  before do
+    sign_in_as_service_operator
+  end
+
+  context "when updating the list of flagged attributes" do
+    it "flags any matching claims" do
+      flagged_claim_trn = create(
+        :claim,
+        :submitted,
+        eligibility_attributes: {
+          teacher_reference_number: "1234567"
+        }
+      )
+
+      flagged_claim_nino = create(
+        :claim,
+        :submitted,
+        national_insurance_number: "QQ123456C"
+      )
+
+      flagged_claim_trn_and_nino = create(
+        :claim,
+        :submitted,
+        eligibility_attributes: {
+          teacher_reference_number: "1234567"
+        },
+        national_insurance_number: "QQ123456C"
+      )
+
+      visit new_admin_fraud_risk_csv_upload_path
+      attach_file "Upload fraud risk CSV file", fraud_risk_csv.path
+      click_on "Upload"
+
+      expect(page).to have_content(
+        "Fraud prevention list uploaded successfully."
+      )
+
+      visit admin_claim_tasks_path(flagged_claim_trn)
+
+      expect(page).to have_content(
+        "This claim has been flagged as the " \
+        "teacher reference number is included on the fraud prevention list."
+      )
+
+      visit admin_claim_tasks_path(flagged_claim_nino)
+
+      expect(page).to have_content(
+        "This claim has been flagged as the " \
+        "national insurance number is included on the fraud prevention list."
+      )
+
+      visit admin_claim_tasks_path(flagged_claim_trn_and_nino)
+
+      expect(page).to have_content(
+        "This claim has been flagged as the " \
+        "national insurance number and teacher reference number are included " \
+        "on the fraud prevention list."
+      )
+
+      visit new_admin_claim_decision_path(flagged_claim_trn)
+
+      approval_option = find("input[type=radio][value=approved]")
+
+      expect(approval_option).to be_disabled
+
+      expect(page).to have_content(
+        "This claim cannot be approved because the teacher reference number " \
+        "is included on the fraud prevention list."
+      )
+
+      visit new_admin_claim_decision_path(flagged_claim_nino)
+
+      approval_option = find("input[type=radio][value=approved]")
+
+      expect(approval_option).to be_disabled
+
+      expect(page).to have_content(
+        "This claim cannot be approved because the national insurance number " \
+        "is included on the fraud prevention list."
+      )
+
+      visit new_admin_claim_decision_path(flagged_claim_trn_and_nino)
+
+      approval_option = find("input[type=radio][value=approved]")
+
+      expect(approval_option).to be_disabled
+
+      expect(page).to have_content(
+        "This claim cannot be approved because the national insurance number " \
+        "and teacher reference number are included on the fraud prevention list."
+      )
+    end
+  end
+
+  it "allows for downloading the csv" do
+    visit new_admin_fraud_risk_csv_upload_path
+    attach_file "Upload fraud risk CSV file", fraud_risk_csv.path
+    click_on "Upload"
+
+    click_on "Download"
+    expect(page.body).to eq(fraud_risk_csv.read.chomp)
+  end
+end
diff --git a/spec/fixtures/files/fraud_risk.csv b/spec/fixtures/files/fraud_risk.csv
new file mode 100644
index 0000000000..26684e5091
--- /dev/null
+++ b/spec/fixtures/files/fraud_risk.csv
@@ -0,0 +1,4 @@
+field,value
+national_insurance_number,qq123456c
+teacher_reference_number,1234567
+
diff --git a/spec/fixtures/files/fraud_risk_missing_headers.csv b/spec/fixtures/files/fraud_risk_missing_headers.csv
new file mode 100644
index 0000000000..f1abd81ec3
--- /dev/null
+++ b/spec/fixtures/files/fraud_risk_missing_headers.csv
@@ -0,0 +1,4 @@
+national_insurance_number,qq123456c
+teacher_reference_number,1234567
+
+
diff --git a/spec/fixtures/files/fraud_risk_missing_value.csv b/spec/fixtures/files/fraud_risk_missing_value.csv
new file mode 100644
index 0000000000..7b7b74387f
--- /dev/null
+++ b/spec/fixtures/files/fraud_risk_missing_value.csv
@@ -0,0 +1,5 @@
+field,value
+national_insurance_number,qq123456c
+teacher_reference_number,1234567
+teacher_reference_number,
+
diff --git a/spec/fixtures/files/fraud_risk_unknown_attribute.csv b/spec/fixtures/files/fraud_risk_unknown_attribute.csv
new file mode 100644
index 0000000000..c7cb826776
--- /dev/null
+++ b/spec/fixtures/files/fraud_risk_unknown_attribute.csv
@@ -0,0 +1,5 @@
+field,value
+national_insurance_number,qq123456c
+teacher_reference_number,1234567
+test,1234567
+rest,1234567
diff --git a/spec/forms/admin/fraud_risk_csv_upload_form_spec.rb b/spec/forms/admin/fraud_risk_csv_upload_form_spec.rb
new file mode 100644
index 0000000000..71f49162bd
--- /dev/null
+++ b/spec/forms/admin/fraud_risk_csv_upload_form_spec.rb
@@ -0,0 +1,140 @@
+require "rails_helper"
+
+RSpec.describe Admin::FraudRiskCsvUploadForm, type: :model do
+  describe "validations" do
+    context "without a file" do
+      it "is invalid" do
+        form = described_class.new
+        expect(form).not_to be_valid
+        expect(form.errors[:file]).to include("can't be blank")
+      end
+    end
+
+    context "with an invalid csv" do
+      it "is invalid" do
+        file_path = Rails.root.join(
+          "spec", "fixtures", "files", "fraud_risk_missing_headers.csv"
+        )
+
+        file = Rack::Test::UploadedFile.new(file_path)
+
+        form = described_class.new(file: file)
+
+        expect(form).not_to be_valid
+        expect(form.errors[:base]).to include(
+          "csv is missing required headers `field`, `value`"
+        )
+      end
+    end
+
+    context "with a missing value csv" do
+      it "is invalid" do
+        file_path = Rails.root.join(
+          "spec", "fixtures", "files", "fraud_risk_missing_value.csv"
+        )
+
+        file = Rack::Test::UploadedFile.new(file_path)
+
+        form = described_class.new(file: file)
+
+        expect(form).not_to be_valid
+        expect(form.errors[:base]).to include("'value' can't be blank")
+      end
+    end
+
+    context "with an unsupported field" do
+      it "is invalid" do
+        file_path = Rails.root.join(
+          "spec", "fixtures", "files", "fraud_risk_unknown_attribute.csv"
+        )
+
+        file = Rack::Test::UploadedFile.new(file_path)
+
+        form = described_class.new(file: file)
+
+        expect(form).not_to be_valid
+        expect(form.errors[:base]).to include(
+          "'test' is not a valid attribute - must be one of teacher_reference_number, national_insurance_number"
+        )
+      end
+    end
+  end
+
+  describe "#save" do
+    let(:file) do
+      Rack::Test::UploadedFile.new(
+        Rails.root.join("spec", "fixtures", "files", "fraud_risk.csv")
+      )
+    end
+
+    let(:form) { described_class.new(file: file) }
+
+    it "creates risk indicator records for each row" do
+      expect(form.save).to be true
+
+      expect(RiskIndicator.count).to eq(2)
+
+      expect(
+        RiskIndicator.where(field: "teacher_reference_number").first.value
+      ).to eq("1234567")
+
+      expect(
+        RiskIndicator.where(field: "national_insurance_number").first.value
+      ).to eq("qq123456c")
+    end
+
+    it "doesn't duplicate existing risk indicator records" do
+      RiskIndicator.create!(
+        field: "teacher_reference_number",
+        value: "1234567"
+      )
+
+      RiskIndicator.create!(
+        field: "national_insurance_number",
+        value: "qq123456c"
+      )
+
+      expect { form.save }.not_to change(RiskIndicator, :count)
+    end
+
+    it "removes risk indicators that are no longer in the CSV" do
+      RiskIndicator.create!(
+        field: "teacher_reference_number",
+        value: "2234567"
+      )
+
+      RiskIndicator.create!(
+        field: "national_insurance_number",
+        value: "qq111111c"
+      )
+
+      _unchanged_risk_indicator = RiskIndicator.create!(
+        field: "national_insurance_number",
+        value: "qq123456c"
+      )
+
+      expect(form.save).to be true
+
+      expect(
+        RiskIndicator.where(
+          field: "teacher_reference_number",
+          value: "2234567"
+        )
+      ).to be_empty
+
+      expect(
+        RiskIndicator.where(
+          field: "national_insurance_number",
+          value: "qq111111c"
+        )
+      ).to be_empty
+
+      expect(
+        RiskIndicator.where(
+          field: "national_insurance_number",
+          value: "qq123456c"
+        )
+      ).to exist
+    end
+  end
+end
diff --git a/spec/models/claim_spec.rb b/spec/models/claim_spec.rb
index e63f7660eb..d6dd248cc1 100644
--- a/spec/models/claim_spec.rb
+++ b/spec/models/claim_spec.rb
@@ -343,6 +343,13 @@
       expect(create(:claim, :submitted, national_insurance_number: national_insurance_number, date_of_birth: 30.years.ago).approvable?).to eq false
     end
 
+    it "returns false if the claim is flagged by a fraud check" do
+      claim = create(:claim, :submitted, national_insurance_number: "QQ123456C")
+      create(:risk_indicator, field: "national_insurance_number", value: "QQ123456C")
+
+      expect(claim.approvable?).to eq false
+    end
+
     context "when the claim is held" do
       subject(:claim) { create(:claim, :held) }
       it { is_expected.not_to be_approvable }