diff --git a/app/services/bulk_upload/lettings/validator.rb b/app/services/bulk_upload/lettings/validator.rb
index 6f37c0f3a..992f06196 100644
--- a/app/services/bulk_upload/lettings/validator.rb
+++ b/app/services/bulk_upload/lettings/validator.rb
@@ -176,6 +176,7 @@ class BulkUpload::Lettings::Validator
   def create_logs?
     return false if any_setup_sections_incomplete?
     return false if over_column_error_threshold?
+    return false if row_parsers.any?(&:block_log_creation?)
 
     row_parsers.all? { |row_parser| row_parser.log.valid? }
   end
diff --git a/spec/services/bulk_upload/lettings/validator_spec.rb b/spec/services/bulk_upload/lettings/validator_spec.rb
index 263c83163..0aaeaac78 100644
--- a/spec/services/bulk_upload/lettings/validator_spec.rb
+++ b/spec/services/bulk_upload/lettings/validator_spec.rb
@@ -87,7 +87,7 @@ RSpec.describe BulkUpload::Lettings::Validator do
     end
   end
 
-  describe "#should_create_logs?" do
+  describe "#create_logs?" do
     context "when all logs are valid" do
       let(:target_path) { file_fixture("2022_23_lettings_bulk_upload.csv") }
 
@@ -111,9 +111,7 @@ RSpec.describe BulkUpload::Lettings::Validator do
         expect(validator).not_to be_create_logs
       end
     end
-  end
 
-  describe "#create_logs?" do
     context "when a log is not valid?" do
       let(:log_1) { build(:lettings_log, :completed, created_by: user) }
       let(:log_2) { build(:lettings_log, :completed, created_by: user) }
@@ -146,6 +144,22 @@ RSpec.describe BulkUpload::Lettings::Validator do
       end
     end
 
+    context "when a single log wants to block log creation" do
+      let(:unaffiliated_org) { create(:organisation) }
+
+      let(:log_1) { build(:lettings_log, :completed, renttype: 1, created_by: user, owning_organisation: unaffiliated_org) }
+
+      before do
+        file.write(BulkUpload::LogToCsv.new(log: log_1, line_ending: "\r\n", col_offset: 0).to_csv_row)
+        file.close
+      end
+
+      it "will not create logs" do
+        validator.call
+        expect(validator).not_to be_create_logs
+      end
+    end
+
     context "when a log has incomplete setup secion" do
       let(:log) { build(:lettings_log, :in_progress, created_by: user, startdate: Time.zone.local(2022, 5, 1)) }