diff --git a/app/mailers/csv_download_mailer.rb b/app/mailers/csv_download_mailer.rb
index d44943e86..b590ebcfc 100644
--- a/app/mailers/csv_download_mailer.rb
+++ b/app/mailers/csv_download_mailer.rb
@@ -15,7 +15,7 @@ class CsvDownloadMailer < NotifyMailer
     send_email(
       user.email,
       CSV_MISSING_LETTINGS_ADDRESSES_DOWNLOAD_TEMPLATE_ID,
-      { name: user.name, issue_explanation: issue_explanation(issue_types), how_to_fix: how_to_fix(issue_types, link, "lettings"), duration: ActiveSupport::Duration.build(duration).inspect },
+      { name: user.name, issue_explanation: issue_explanation(issue_types, "lettings"), how_to_fix: how_to_fix(issue_types, link, "lettings"), duration: ActiveSupport::Duration.build(duration).inspect },
     )
   end
 
@@ -23,7 +23,7 @@ class CsvDownloadMailer < NotifyMailer
     send_email(
       user.email,
       CSV_MISSING_SALES_ADDRESSES_DOWNLOAD_TEMPLATE_ID,
-      { name: user.name, issue_explanation: issue_explanation(issue_types), how_to_fix: how_to_fix(issue_types, link, "sales"), duration: ActiveSupport::Duration.build(duration).inspect },
+      { name: user.name, issue_explanation: issue_explanation(issue_types, "sales"), how_to_fix: how_to_fix(issue_types, link, "sales"), duration: ActiveSupport::Duration.build(duration).inspect },
     )
   end
 
@@ -31,12 +31,12 @@ private
 
   HELPDESK_URL = "https://dluhcdigital.atlassian.net/servicedesk/customer/portal/6/group/11".freeze
 
-  def issue_explanation(issue_types)
+  def issue_explanation(issue_types, log_type)
     [
       "We have found #{multiple_issue_types?(issue_types) ? 'these issues' : 'this issue'} in your logs imported to the new version of CORE:\n",
       issue_types.include?("missing_address") ? "## Full address required\nThe Unique Property Reference number (UPRN) in some logs is incorrect, so the address data was not imported. Provide the full address and leave the UPRN column blank.\n" : "",
       issue_types.include?("missing_town") ? "## Missing town or city\nThe town or city in some logs is missing. This data is required in the new version of CORE.\n" : "",
-      has_uprn_issues(issue_types) ? uprn_issue_explanation(issue_types) : "",
+      has_uprn_issues(issue_types) ? uprn_issue_explanation(issue_types, log_type) : "",
     ].join("")
   end
 
@@ -62,11 +62,11 @@ private
     issue_types.count > 1 && !uprn_issues_only(issue_types) || issue_types.count > 2
   end
 
-  def uprn_issue_explanation(issue_types)
+  def uprn_issue_explanation(issue_types, log_type)
     if issue_types.include?("wrong_uprn") && !issue_types.include?("bristol_uprn")
       "## Incorrect UPRN\nThe UPRN in some logs may be incorrect, so the wrong address data may have been imported.
 
-In some of your logs, the UPRN is the same as the tenant code or property reference, but these are different things. Property references are codes that yourorganisation uses to identify properties. UPRNs are unique numbers assigned by the Ordnance Survey.
+In some of your logs, the UPRN is the same as the #{log_type == 'lettings' ? 'tenant code or property reference' : 'purchaser code'}, but these are different things. #{log_type == 'lettings' ? 'Property references' : 'Purchaser codes'} are codes that your organisation uses to identify properties. UPRNs are unique numbers assigned by the Ordnance Survey.
 
 If a log has the correct UPRN, leave the UPRN unchanged. If the UPRN is incorrect, clear the value and provide the full address instead. Alternatively, you can change the UPRN on the CORE system.\n"
     elsif issue_types.include?("bristol_uprn") && !issue_types.include?("wrong_uprn")
@@ -78,7 +78,7 @@ If a log has the correct UPRN, leave the UPRN unchanged. If the UPRN is incorrec
 
 In some of your logs, the UPRN links to an address in Bristol, but this is the first time your organisation has submitted logs for properties in Bristol.
 
-In other logs, the UPRN is the same as the tenant code or property reference, but these are different things. Property references are codes that your organisation uses to identify properties. UPRNs are unique numbers assigned by the Ordnance Survey.
+In other logs, the UPRN is the same as the #{log_type == 'lettings' ? 'tenant code or property reference' : 'purchaser code'}, but these are different things. #{log_type == 'lettings' ? 'Property references' : 'Purchaser codes'} are codes that your organisation uses to identify properties. UPRNs are unique numbers assigned by the Ordnance Survey.
 
 If a log has the correct UPRN, leave the UPRN unchanged. If the UPRN is incorrect, clear the value and provide the full address instead. Alternatively, you can change the UPRN on the CORE system."
     end
diff --git a/app/services/csv/missing_addresses_csv_service.rb b/app/services/csv/missing_addresses_csv_service.rb
index 0b92a852c..a10beaa1d 100644
--- a/app/services/csv/missing_addresses_csv_service.rb
+++ b/app/services/csv/missing_addresses_csv_service.rb
@@ -28,7 +28,7 @@ module Csv
       return if logs_with_missing_addresses.empty? && logs_with_missing_town_or_city.empty? && logs_with_wrong_uprn.empty?
 
       CSV.generate(headers: true) do |csv|
-        csv << ["Issue type", "Log ID", "Tenancy start date", "Tenant code", "Property reference", "Log owner", "Owning organisation", "Managing organisation", "UPRN", "Address Line 1", "Address Line 2 (optional)", "Town or City", "County (optional)", "Property’s postcode"]
+        csv << ["Issue type", "Log ID", "Tenancy start date", "Tenant code", "Property reference", "Log owner", "Owning organisation", "Managing organisation", "UPRN", "Address Line 1", "Address Line 2 (optional)", "Town or City", "County (optional)", "Property's postcode"]
 
         logs_with_missing_addresses.each do |log|
           csv << ["Full address required"] + lettings_log_to_csv_row(log)
@@ -39,7 +39,7 @@ module Csv
         end
 
         logs_with_wrong_uprn.each do |log|
-          csv << ["UPRN issues"] + lettings_log_to_csv_row(log)
+          csv << ["Incorrect UPRN"] + lettings_log_to_csv_row(log)
         end
       end
     end
@@ -65,7 +65,7 @@ module Csv
       return if logs_with_missing_addresses.empty? && logs_with_missing_town_or_city.empty? && logs_with_wrong_uprn.empty?
 
       CSV.generate(headers: true) do |csv|
-        csv << ["Issue type", "Log ID", "Sale completion date", "Purchaser code", "Log owner", "Owning organisation", "UPRN", "Address Line 1", "Address Line 2 (optional)", "Town or City", "County (optional)", "Property’s postcode"]
+        csv << ["Issue type", "Log ID", "Sale completion date", "Purchaser code", "Log owner", "Owning organisation", "UPRN", "Address Line 1", "Address Line 2 (optional)", "Town or City", "County (optional)", "Property's postcode"]
 
         logs_with_missing_addresses.each do |log|
           csv << ["Full address required"] + sales_log_to_csv_row(log)
@@ -76,7 +76,7 @@ module Csv
         end
 
         logs_with_wrong_uprn.each do |log|
-          csv << ["UPRN issues"] + sales_log_to_csv_row(log)
+          csv << ["Incorrect UPRN"] + sales_log_to_csv_row(log)
         end
       end
     end
@@ -85,7 +85,7 @@ module Csv
       logs = @organisation.managed_lettings_logs.filter_by_year(2023)
 
       CSV.generate(headers: true) do |csv|
-        csv << ["Log ID", "Tenancy start date", "Tenant code", "Property reference", "Log owner", "Owning organisation", "Managing organisation", "UPRN", "Address Line 1", "Address Line 2 (optional)", "Town or City", "County (optional)", "Property’s postcode"]
+        csv << ["Log ID", "Tenancy start date", "Tenant code", "Property reference", "Log owner", "Owning organisation", "Managing organisation", "UPRN", "Address Line 1", "Address Line 2 (optional)", "Town or City", "County (optional)", "Property's postcode"]
 
         logs.each do |log|
           csv << lettings_log_to_csv_row(log)
@@ -97,7 +97,7 @@ module Csv
       logs = @organisation.sales_logs.filter_by_year(2023)
 
       CSV.generate(headers: true) do |csv|
-        csv << ["Log ID", "Sale completion date", "Purchaser code", "Log owner", "Owning organisation", "UPRN", "Address Line 1", "Address Line 2 (optional)", "Town or City", "County (optional)", "Property’s postcode"]
+        csv << ["Log ID", "Sale completion date", "Purchaser code", "Log owner", "Owning organisation", "UPRN", "Address Line 1", "Address Line 2 (optional)", "Town or City", "County (optional)", "Property's postcode"]
 
         logs.each do |log|
           csv << sales_log_to_csv_row(log)
diff --git a/spec/fixtures/files/addresses_reimport.csv b/spec/fixtures/files/addresses_reimport.csv
index d413b3ffc..b797ac9b4 100644
--- a/spec/fixtures/files/addresses_reimport.csv
+++ b/spec/fixtures/files/addresses_reimport.csv
@@ -1,7 +1,7 @@
-Issue type,Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
+Issue type,Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
 Full address required,{id},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,address 1,address 2,town,county,B1 1BB
 Missing town or city,{id2},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,address 3,,city,,B1 1BB
-UPRN issues,{id3},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,123,Some Place,,Bristol,,BS1 1AD
-UPRN issues,{id4},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,Some Place,,,,BS1 1AD
-UPRN issues,,2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,Some Place,,Bristol,,BS1 1AD
-UPRN issues,fake_id,2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,Some Place,,Bristol,,BS1 1AD
+Incorrect UPRN,{id3},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,123,Some Place,,Bristol,,BS1 1AD
+Incorrect UPRN,{id4},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,Some Place,,,,BS1 1AD
+Incorrect UPRN,,2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,Some Place,,Bristol,,BS1 1AD
+Incorrect UPRN,fake_id,2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,Some Place,,Bristol,,BS1 1AD
diff --git a/spec/fixtures/files/addresses_reimport_all_logs.csv b/spec/fixtures/files/addresses_reimport_all_logs.csv
index 9bf372231..0a1368d28 100644
--- a/spec/fixtures/files/addresses_reimport_all_logs.csv
+++ b/spec/fixtures/files/addresses_reimport_all_logs.csv
@@ -1,4 +1,4 @@
-Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
+Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
 {id},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,address 1,address 2,town,county,B1 1BB
 {id2},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,address 3,,city,,B1 1BB
 {id3},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,123,Some Place,,Bristol,,BS1 1AD
diff --git a/spec/fixtures/files/missing_lettings_logs_addresses.csv b/spec/fixtures/files/missing_lettings_logs_addresses.csv
index 457bcf894..12475c026 100644
--- a/spec/fixtures/files/missing_lettings_logs_addresses.csv
+++ b/spec/fixtures/files/missing_lettings_logs_addresses.csv
@@ -1,2 +1,2 @@
-Issue type,Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
+Issue type,Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
 Full address required,{id},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,,,,,
diff --git a/spec/fixtures/files/missing_lettings_logs_addresses_all_issues.csv b/spec/fixtures/files/missing_lettings_logs_addresses_all_issues.csv
index 26e9cb21b..ad6e1c865 100644
--- a/spec/fixtures/files/missing_lettings_logs_addresses_all_issues.csv
+++ b/spec/fixtures/files/missing_lettings_logs_addresses_all_issues.csv
@@ -1,4 +1,4 @@
-Issue type,Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
+Issue type,Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
 Full address required,{id},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,,,,,
 Missing town or city,{id},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,existing address,,,,
-UPRN issues,{id},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,123,Some Place,,Bristol,,BS1 1AD
+Incorrect UPRN,{id},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,123,Some Place,,Bristol,,BS1 1AD
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 22017c3a7..4c8c65ea8 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 @@
-Issue type,Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
+Issue type,Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
 Missing town or city,{id},2023-04-05,tenancycode,propcode,testy@example.com,Address org,Address org,,existing address,,,,
diff --git a/spec/fixtures/files/missing_lettings_logs_wrong_uprn.csv b/spec/fixtures/files/missing_lettings_logs_wrong_uprn.csv
index dfbb6b2b1..238cc5aef 100644
--- a/spec/fixtures/files/missing_lettings_logs_wrong_uprn.csv
+++ b/spec/fixtures/files/missing_lettings_logs_wrong_uprn.csv
@@ -1,2 +1,2 @@
-Issue type,Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
-UPRN issues,{id},2023-04-05,tenancycode,12,testy@example.com,Address org,Address org,12,Some Place,,Newcastle,,EC1N 2TD
+Issue type,Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
+Incorrect UPRN,{id},2023-04-05,tenancycode,12,testy@example.com,Address org,Address org,12,Some Place,,Newcastle,,EC1N 2TD
diff --git a/spec/fixtures/files/missing_sales_logs_addresses.csv b/spec/fixtures/files/missing_sales_logs_addresses.csv
index 960a6a488..80892a2cf 100644
--- a/spec/fixtures/files/missing_sales_logs_addresses.csv
+++ b/spec/fixtures/files/missing_sales_logs_addresses.csv
@@ -1,2 +1,2 @@
-Issue type,Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
+Issue type,Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
 Full address required,{id},2023-04-05,purchaser code,testy@example.com,Address org,,,,,,
diff --git a/spec/fixtures/files/missing_sales_logs_addresses_all_issues.csv b/spec/fixtures/files/missing_sales_logs_addresses_all_issues.csv
index 1abc50ab7..1ef3aecb6 100644
--- a/spec/fixtures/files/missing_sales_logs_addresses_all_issues.csv
+++ b/spec/fixtures/files/missing_sales_logs_addresses_all_issues.csv
@@ -1,4 +1,4 @@
-Issue type,Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
+Issue type,Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
 Full address required,{id},2023-04-05,purchaser code,testy@example.com,Address org,,,,,,
 Missing town or city,{id},2023-04-05,purchaser code,testy@example.com,Address org,,existing address line 1,,,,
-UPRN issues,{id},2023-04-05,purchaser code,testy@example.com,Address org,123,Some Place,,Bristol,,BS1 1AD
+Incorrect UPRN,{id},2023-04-05,purchaser code,testy@example.com,Address org,123,Some Place,,Bristol,,BS1 1AD
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 931022762..b1f76611e 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 @@
-Issue type,Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
+Issue type,Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
 Missing town or city,{id},2023-04-05,purchaser code,testy@example.com,Address org,,existing address line 1,,,,
diff --git a/spec/fixtures/files/missing_sales_logs_wrong_uprn.csv b/spec/fixtures/files/missing_sales_logs_wrong_uprn.csv
index 4b6abd53b..1964dd673 100644
--- a/spec/fixtures/files/missing_sales_logs_wrong_uprn.csv
+++ b/spec/fixtures/files/missing_sales_logs_wrong_uprn.csv
@@ -1,2 +1,2 @@
-Issue type,Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
-UPRN issues,{id},2023-04-05,12,testy@example.com,Address org,12,Some Place,,Newcastle,,EC1N 2TD
+Issue type,Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
+Incorrect UPRN,{id},2023-04-05,12,testy@example.com,Address org,12,Some Place,,Newcastle,,EC1N 2TD
diff --git a/spec/fixtures/files/sales_addresses_reimport.csv b/spec/fixtures/files/sales_addresses_reimport.csv
index b613e70c2..f9cd0bc13 100644
--- a/spec/fixtures/files/sales_addresses_reimport.csv
+++ b/spec/fixtures/files/sales_addresses_reimport.csv
@@ -1,7 +1,7 @@
-Issue type,Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
+Issue type,Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
 Full address required,{id},2023-04-05,purchid,testy@example.com,Address org,,address 1,address 2,town,county,B1 1BB
 Missing town or city,{id2},2023-04-05,purchid,testy@example.com,Address org,,address 3,,city,,B1 1BB
-UPRN issues,{id3},2023-04-05,purchid,testy@example.com,Address org,123,Some Place,,Bristol,,BS1 1AD
-UPRN issues,{id4},2023-04-05,purchid,testy@example.com,Address org,,Some Place,,,,BS1 1AD
-UPRN issues,,2023-04-05,purchid,testy@example.com,Address org,,Some Place,,Bristol,,BS1 1AD
-UPRN issues,fake_id,2023-04-05,purchid,testy@example.com,Address org,,Some Place,,Bristol,,BS1 1AD
+Incorrect UPRN,{id3},2023-04-05,purchid,testy@example.com,Address org,123,Some Place,,Bristol,,BS1 1AD
+Incorrect UPRN,{id4},2023-04-05,purchid,testy@example.com,Address org,,Some Place,,,,BS1 1AD
+Incorrect UPRN,,2023-04-05,purchid,testy@example.com,Address org,,Some Place,,Bristol,,BS1 1AD
+Incorrect UPRN,fake_id,2023-04-05,purchid,testy@example.com,Address org,,Some Place,,Bristol,,BS1 1AD
diff --git a/spec/fixtures/files/sales_addresses_reimport_all_logs.csv b/spec/fixtures/files/sales_addresses_reimport_all_logs.csv
index 4ba69002b..e9ebee3cb 100644
--- a/spec/fixtures/files/sales_addresses_reimport_all_logs.csv
+++ b/spec/fixtures/files/sales_addresses_reimport_all_logs.csv
@@ -1,4 +1,4 @@
-Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode
+Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode
 {id},2023-04-05,purchid,testy@example.com,Address org,,address 1,address 2,town,county,B1 1BB
 {id2},2023-04-05,purchid,testy@example.com,Address org,,address 3,,city,,B1 1BB
 {id3},2023-04-05,purchid,testy@example.com,Address org,123,Some Place,,Bristol,,BS1 1AD
diff --git a/spec/mailers/csv_download_mailer_spec.rb b/spec/mailers/csv_download_mailer_spec.rb
index d93a99d02..704d71e1e 100644
--- a/spec/mailers/csv_download_mailer_spec.rb
+++ b/spec/mailers/csv_download_mailer_spec.rb
@@ -66,7 +66,7 @@ The town or city in some logs is missing. This data is required in the new versi
           issue_explanation: "We have found this issue in your logs imported to the new version of CORE:
 ## Incorrect UPRN\nThe UPRN in some logs may be incorrect, so the wrong address data may have been imported.
 
-In some of your logs, the UPRN is the same as the tenant code or property reference, but these are different things. Property references are codes that yourorganisation uses to identify properties. UPRNs are unique numbers assigned by the Ordnance Survey.
+In some of your logs, the UPRN is the same as the purchaser code, but these are different things. Purchaser codes are codes that your organisation uses to identify properties. UPRNs are unique numbers assigned by the Ordnance Survey.
 
 If a log has the correct UPRN, leave the UPRN unchanged. If the UPRN is incorrect, clear the value and provide the full address instead. Alternatively, you can change the UPRN on the CORE system.\n",
           how_to_fix: "You need to:\n
diff --git a/spec/services/csv/missing_addresses_csv_service_spec.rb b/spec/services/csv/missing_addresses_csv_service_spec.rb
index b3e9b41db..e8482f4cb 100644
--- a/spec/services/csv/missing_addresses_csv_service_spec.rb
+++ b/spec/services/csv/missing_addresses_csv_service_spec.rb
@@ -408,7 +408,7 @@ RSpec.describe Csv::MissingAddressesCsvService do
 
       it "returns only headers" do
         csv = service.create_lettings_addresses_csv
-        expect(csv).to eq "Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode\n"
+        expect(csv).to eq "Log ID,Tenancy start date,Tenant code,Property reference,Log owner,Owning organisation,Managing organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode\n"
       end
     end
   end
@@ -505,7 +505,7 @@ RSpec.describe Csv::MissingAddressesCsvService do
 
       it "returns only headers" do
         csv = service.create_sales_addresses_csv
-        expect(csv).to eq("Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property’s postcode\n")
+        expect(csv).to eq("Log ID,Sale completion date,Purchaser code,Log owner,Owning organisation,UPRN,Address Line 1,Address Line 2 (optional),Town or City,County (optional),Property's postcode\n")
       end
     end
   end