diff --git a/app/forms/journeys/further_education_payments/claim_submission_form.rb b/app/forms/journeys/further_education_payments/claim_submission_form.rb
index 6feeb5b2bf..83e6eb5582 100644
--- a/app/forms/journeys/further_education_payments/claim_submission_form.rb
+++ b/app/forms/journeys/further_education_payments/claim_submission_form.rb
@@ -4,7 +4,13 @@ class ClaimSubmissionForm < ::ClaimSubmissionBaseForm
       def save
         super
 
-        ClaimMailer.further_education_payment_provider_verification_email(claim).deliver_later
+        if Policies::FurtherEducationPayments.duplicate_claim?(claim)
+          claim.eligibility.update!(flagged_as_duplicate: true)
+        else
+          ClaimMailer.further_education_payment_provider_verification_email(claim).deliver_later
+        end
+
+        true
       end
 
       private
diff --git a/app/models/policies/further_education_payments.rb b/app/models/policies/further_education_payments.rb
index ff6d8e82e0..ef1e8ff046 100644
--- a/app/models/policies/further_education_payments.rb
+++ b/app/models/policies/further_education_payments.rb
@@ -32,5 +32,9 @@ def notify_reply_to_id
     def verification_due_date_for_claim(claim)
       (claim.created_at + 2.weeks).to_date
     end
+
+    def duplicate_claim?(claim)
+      Claim::MatchingAttributeFinder.new(claim).matching_claims.exists?
+    end
   end
 end
diff --git a/config/analytics.yml b/config/analytics.yml
index 071d906938..f46111dadd 100644
--- a/config/analytics.yml
+++ b/config/analytics.yml
@@ -296,6 +296,7 @@ shared:
     - subject_to_formal_performance_action
     - subject_to_disciplinary_action
     - half_teaching_hours
+    - flagged_as_duplicate
   :eligible_fe_providers:
     - id
     - ukprn
diff --git a/db/migrate/20240904105917_add_flagged_as_duplicate_to_further_education_payments_eligibilities.rb b/db/migrate/20240904105917_add_flagged_as_duplicate_to_further_education_payments_eligibilities.rb
new file mode 100644
index 0000000000..39e4241b4a
--- /dev/null
+++ b/db/migrate/20240904105917_add_flagged_as_duplicate_to_further_education_payments_eligibilities.rb
@@ -0,0 +1,8 @@
+class AddFlaggedAsDuplicateToFurtherEducationPaymentsEligibilities < ActiveRecord::Migration[7.0]
+  def change
+    add_column :further_education_payments_eligibilities,
+      :flagged_as_duplicate,
+      :boolean,
+      default: false
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 4ed500a64b..9e6740d5c2 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_08_21_121253) do
+ActiveRecord::Schema[7.0].define(version: 2024_09_04_105917) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "citext"
   enable_extension "pg_trgm"
@@ -254,6 +254,7 @@
     t.boolean "subject_to_disciplinary_action"
     t.boolean "half_teaching_hours"
     t.jsonb "verification", default: {}
+    t.boolean "flagged_as_duplicate", default: false
     t.index ["possible_school_id"], name: "index_fe_payments_eligibilities_on_possible_school_id"
     t.index ["school_id"], name: "index_fe_payments_eligibilities_on_school_id"
   end
diff --git a/spec/forms/journeys/further_education_payments/claim_submission_form_spec.rb b/spec/forms/journeys/further_education_payments/claim_submission_form_spec.rb
index 526165d6fd..eb1f96d6da 100644
--- a/spec/forms/journeys/further_education_payments/claim_submission_form_spec.rb
+++ b/spec/forms/journeys/further_education_payments/claim_submission_form_spec.rb
@@ -83,5 +83,30 @@
         )
       )
     end
+
+    it "doesn't email the provider if the claim is a duplicate" do
+      allow(ClaimVerifierJob).to receive(:perform_later)
+
+      allow(ClaimMailer).to(
+        receive(:further_education_payment_provider_verification_email)
+      ).and_return(double(deliver_later: nil))
+
+      first_claim_form = described_class.new(journey_session: journey_session)
+      second_claim_form = described_class.new(journey_session: journey_session)
+
+      first_claim_form.save
+      second_claim_form.save
+
+      expect(ClaimMailer).to(
+        have_received(:further_education_payment_provider_verification_email)
+        .exactly(1).times
+      )
+
+      original_claim = first_claim_form.claim
+      duplicate_claim = second_claim_form.claim
+
+      expect(original_claim.eligibility.flagged_as_duplicate).to eq(false)
+      expect(duplicate_claim.eligibility.flagged_as_duplicate).to eq(true)
+    end
   end
 end