diff --git a/CHANGELOG.md b/CHANGELOG.md
index aaee500..653dfb2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Unreleased (2023-12-01)
+
+- Update `BatchReportResource#batch_report_body` to allow `sub merchant id` to be received from `Bambora::Client` or `elements`
+
 ## 0.6.0 (2023-05-02)
 
 - Updating minimum Ruby version to Ruby 2.7.7
diff --git a/lib/bambora/bank/batch_report_resource.rb b/lib/bambora/bank/batch_report_resource.rb
index 4684833..bd19b37 100644
--- a/lib/bambora/bank/batch_report_resource.rb
+++ b/lib/bambora/bank/batch_report_resource.rb
@@ -83,7 +83,7 @@ def batch_report_body(request_data)
           merchant_id: client.merchant_id,
           pass_code: api_key,
           sub_merchant_id: client.sub_merchant_id,
-        )
+        ).compact
       end
     end
   end
diff --git a/lib/bambora/client.rb b/lib/bambora/client.rb
index ff19dc0..d6d7587 100644
--- a/lib/bambora/client.rb
+++ b/lib/bambora/client.rb
@@ -163,7 +163,7 @@ def bank_profiles(api_key:)
     #
     # @param api_key [String] API key for the bank profiles endpoint.
     #
-    # @return [Bambora::Bank::PaymentProfileResource]
+    # @return [Bambora::Bank::BatchReportResource]
     def batch_reports(api_key:)
       @batch_reports = Bambora::Bank::BatchReportResource.new(
         client: xml_client,
diff --git a/spec/bambora/bank/batch_report_resource_spec.rb b/spec/bambora/bank/batch_report_resource_spec.rb
index 6708362..76a6a15 100644
--- a/spec/bambora/bank/batch_report_resource_spec.rb
+++ b/spec/bambora/bank/batch_report_resource_spec.rb
@@ -6,12 +6,15 @@ module Bambora
   module Bank
     describe BatchReportResource do
       subject(:reports) { described_class.new(client: client, api_key: api_key) }
+      subject(:reports_without_sub_merchant_id) do
+        described_class.new(client: client_without_sub_merchant_id, api_key: api_key)
+      end
 
       let(:api_key) { 'fakekey' }
       let(:merchant_id) { 1 }
       let(:sub_merchant_id) { 2 }
       let(:base_url) { 'https://sandbox-web.na.bambora.com' }
-      let(:headers) { { 'Authorization' => 'Passcode MTpmYWtla2V5', 'Sub-Merchant-ID' => sub_merchant_id } }
+
       let(:response_body) do
         {
           response: {
@@ -96,6 +99,15 @@ module Bank
         )
       end
 
+      let(:client_without_sub_merchant_id) do
+        instance_double(
+          'Bambora::Rest::XMLClient',
+          merchant_id: merchant_id,
+          sub_merchant_id: nil,
+          post: response_body,
+        )
+      end
+
       describe '#show' do
         let(:batch_id) { 1 }
         let(:from_date) { Time.now.to_s }
@@ -112,6 +124,7 @@ module Bank
             service_name: service_name,
           }
         end
+
         let(:posted_data) do
           {
             body: {
@@ -132,6 +145,34 @@ module Bank
           }
         end
 
+        let(:request_data_with_rpt_merchant_id) do
+          {
+            service_name: service_name,
+            rpt_filter_by_1: 'returned_date',
+            rpt_operation_type_1: 'GT',
+            rpt_filter_value_1: '2023-08-01',
+            rpt_merchant_id: 'AllLive',
+          }
+        end
+
+        let(:posted_data_with_rpt_merchant_id) do
+          {
+            body: {
+              merchant_id: 1,
+              pass_code: 'fakekey',
+              rpt_filter_by_1: 'returned_date',
+              rpt_filter_value_1: '2023-08-01',
+              rpt_format: 'JSON',
+              rpt_operation_type_1: 'GT',
+              rpt_version: '2.0',
+              rpt_merchant_id: 'AllLive',
+              service_name: service_name,
+              session_source: 'external',
+            },
+            path: '/scripts/reporting/report.aspx',
+          }
+        end
+
         context 'with no messageId' do
           it 'sends `post` to the client with the correct data' do
             reports.show(request_data)
@@ -141,6 +182,15 @@ module Bank
           it 'returns the expected response' do
             expect(reports.show(request_data)).to eq expected_response
           end
+
+          it 'sends `post` to the client with the correct data where the sub merchant id comes from elements' do
+            reports_without_sub_merchant_id.show(request_data_with_rpt_merchant_id)
+            expect(client_without_sub_merchant_id).to have_received(:post).with(posted_data_with_rpt_merchant_id)
+          end
+
+          it 'returns the expected response' do
+            expect(reports_without_sub_merchant_id.show(request_data_with_rpt_merchant_id)).to eq expected_response
+          end
         end
 
         context 'with messageIds' do