diff --git a/app/services/csv/missing_addresses_csv_service.rb b/app/services/csv/missing_addresses_csv_service.rb
index cec3ac736..616c9ac85 100644
--- a/app/services/csv/missing_addresses_csv_service.rb
+++ b/app/services/csv/missing_addresses_csv_service.rb
@@ -36,10 +36,11 @@ module Csv
 
     def generate_missing_lettings_addresses_csv(logs)
       CSV.generate(headers: true) do |csv|
-        csv << ["Tenancy start date", "Tenant code", "Property code", "Log owner", "Owning organisation name", "Managing organisation name", "Address line 1", "Address line 2", "Town or City", "County", "Postcode", "Local authority"]
+        csv << ["Lettings log ID", "Tenancy start date", "Tenant code", "Property code", "Log owner", "Owning organisation name", "Managing organisation name", "Address line 1", "Address line 2", "Town or City", "County", "Postcode", "Local authority"]
 
         logs.each do |log|
-          csv << [log.startdate&.to_date,
+          csv << [log.id,
+                  log.startdate&.to_date,
                   log.tenancycode,
                   log.propcode,
                   log.created_by&.email,
@@ -57,10 +58,11 @@ module Csv
 
     def generate_missing_sales_addresses_csv(logs)
       CSV.generate(headers: true) do |csv|
-        csv << ["Sale completion date", "Purchaser code", "Log owner", "Owning organisation name", "Address line 1", "Address line 2", "Town or City", "County", "Postcode", "Local authority"]
+        csv << ["Sales log ID", "Sale completion date", "Purchaser code", "Log owner", "Owning organisation name", "Address line 1", "Address line 2", "Town or City", "County", "Postcode", "Local authority"]
 
         logs.each do |log|
-          csv << [log.saledate&.to_date,
+          csv << [log.id,
+                  log.saledate&.to_date,
                   log.purchid,
                   log.created_by&.email,
                   log.owning_organisation&.name,
diff --git a/spec/fixtures/files/missing_lettings_logs_addresses.csv b/spec/fixtures/files/missing_lettings_logs_addresses.csv
index 240813911..72d60ab64 100644
--- a/spec/fixtures/files/missing_lettings_logs_addresses.csv
+++ b/spec/fixtures/files/missing_lettings_logs_addresses.csv
@@ -1,2 +1,2 @@
-Tenancy start date,Tenant code,Property code,Log owner,Owning organisation name,Managing organisation name,Address line 1,Address line 2,Town or City,County,Postcode,Local authority
-2023-04-05,tenancycode,propcode,testy@example.com,Address test,Address test,,,,,,
\ No newline at end of file
+Lettings log ID,Tenancy start date,Tenant code,Property code,Log owner,Owning organisation name,Managing organisation name,Address line 1,Address line 2,Town or City,County,Postcode,Local authority
+{id},2023-04-05,tenancycode,propcode,testy@example.com,Address test,Address test,,,,,,
diff --git a/spec/fixtures/files/missing_lettings_logs_town_or_city.csv b/spec/fixtures/files/missing_lettings_logs_town_or_city.csv
index 482bf7808..f13395d6f 100644
--- a/spec/fixtures/files/missing_lettings_logs_town_or_city.csv
+++ b/spec/fixtures/files/missing_lettings_logs_town_or_city.csv
@@ -1,2 +1,2 @@
-Tenancy start date,Tenant code,Property code,Log owner,Owning organisation name,Managing organisation name,Address line 1,Address line 2,Town or City,County,Postcode,Local authority
-2023-04-05,tenancycode,propcode,testy@example.com,Address test,Address test,existing address,,,,,
\ No newline at end of file
+Lettings log ID,Tenancy start date,Tenant code,Property code,Log owner,Owning organisation name,Managing organisation name,Address line 1,Address line 2,Town or City,County,Postcode,Local authority
+{id},2023-04-05,tenancycode,propcode,testy@example.com,Address test,Address test,existing address,,,,,
diff --git a/spec/fixtures/files/missing_sales_logs_addresses.csv b/spec/fixtures/files/missing_sales_logs_addresses.csv
index 21fed20b3..eee95fe17 100644
--- a/spec/fixtures/files/missing_sales_logs_addresses.csv
+++ b/spec/fixtures/files/missing_sales_logs_addresses.csv
@@ -1,2 +1,2 @@
-Sale completion date,Purchaser code,Log owner,Owning organisation name,Address line 1,Address line 2,Town or City,County,Postcode,Local authority
-2023-04-05,purchaser code,testy@example.com,Address test,,,,,,
\ No newline at end of file
+Sales log ID,Sale completion date,Purchaser code,Log owner,Owning organisation name,Address line 1,Address line 2,Town or City,County,Postcode,Local authority
+{id},2023-04-05,purchaser code,testy@example.com,Address test,,,,,,
diff --git a/spec/fixtures/files/missing_sales_logs_town_or_city.csv b/spec/fixtures/files/missing_sales_logs_town_or_city.csv
index a5eefdc9d..070b5b829 100644
--- a/spec/fixtures/files/missing_sales_logs_town_or_city.csv
+++ b/spec/fixtures/files/missing_sales_logs_town_or_city.csv
@@ -1,2 +1,2 @@
-Sale completion date,Purchaser code,Log owner,Owning organisation name,Address line 1,Address line 2,Town or City,County,Postcode,Local authority
-2023-04-05,purchaser code,testy@example.com,Address test,existing address line 1,,,,,
\ No newline at end of file
+Sales log ID,Sale completion date,Purchaser code,Log owner,Owning organisation name,Address line 1,Address line 2,Town or City,County,Postcode,Local authority
+{id},2023-04-05,purchaser code,testy@example.com,Address test,existing address line 1,,,,,
diff --git a/spec/services/csv/missing_addresses_csv_service_spec.rb b/spec/services/csv/missing_addresses_csv_service_spec.rb
index 92765950c..46e08142a 100644
--- a/spec/services/csv/missing_addresses_csv_service_spec.rb
+++ b/spec/services/csv/missing_addresses_csv_service_spec.rb
@@ -5,6 +5,10 @@ RSpec.describe Csv::MissingAddressesCsvService do
   let(:user) { create(:user, organisation:, email: "testy@example.com") }
   let(:service) { described_class.new(organisation) }
 
+  def replace_entity_ids(lettings_log, export_template)
+    export_template.sub!(/\{id\}/, lettings_log.id.to_s)
+  end
+
   describe "#create_missing_lettings_addresses_csv" do
     let!(:lettings_log) do
       create(:lettings_log,
@@ -24,8 +28,8 @@ RSpec.describe Csv::MissingAddressesCsvService do
 
     context "when the organisation has logs with missing addresses" do
       it "returns a csv with relevant logs" do
-        expected_content = CSV.read("spec/fixtures/files/missing_lettings_logs_addresses.csv")
-        csv = CSV.parse(service.create_missing_lettings_addresses_csv)
+        expected_content = replace_entity_ids(lettings_log, File.open("spec/fixtures/files/missing_lettings_logs_addresses.csv").read)
+        csv = service.create_missing_lettings_addresses_csv
         expect(csv).to eq(expected_content)
       end
     end
@@ -77,8 +81,8 @@ RSpec.describe Csv::MissingAddressesCsvService do
 
     context "when the organisation has logs with missing addresses" do
       it "returns a csv with relevant logs" do
-        expected_content = CSV.read("spec/fixtures/files/missing_sales_logs_addresses.csv")
-        csv = CSV.parse(service.create_missing_sales_addresses_csv)
+        expected_content = replace_entity_ids(sales_log, File.open("spec/fixtures/files/missing_sales_logs_addresses.csv").read)
+        csv = service.create_missing_sales_addresses_csv
         expect(csv).to eq(expected_content)
       end
     end
@@ -123,8 +127,8 @@ RSpec.describe Csv::MissingAddressesCsvService do
 
     context "when the organisation has logs with missing town or city only" do
       it "returns a csv with relevant logs" do
-        expected_content = CSV.read("spec/fixtures/files/missing_lettings_logs_town_or_city.csv")
-        csv = CSV.parse(service.create_missing_lettings_town_or_city_csv)
+        expected_content = replace_entity_ids(lettings_log, File.open("spec/fixtures/files/missing_lettings_logs_town_or_city.csv").read)
+        csv = service.create_missing_lettings_town_or_city_csv
         expect(csv).to eq(expected_content)
       end
     end
@@ -176,8 +180,8 @@ RSpec.describe Csv::MissingAddressesCsvService do
 
     context "when the organisation has logs with missing town_or_city only" do
       it "returns a csv with relevant logs" do
-        expected_content = CSV.read("spec/fixtures/files/missing_sales_logs_town_or_city.csv")
-        csv = CSV.parse(service.create_missing_sales_town_or_city_csv)
+        expected_content = replace_entity_ids(sales_log, File.open("spec/fixtures/files/missing_sales_logs_town_or_city.csv").read)
+        csv = service.create_missing_sales_town_or_city_csv
         expect(csv).to eq(expected_content)
       end
     end