diff --git a/app/doc/open_api/v1/accounting_doc.rb b/app/doc/open_api/v1/accounting_doc.rb
index 43d82d879..a022ba21c 100644
--- a/app/doc/open_api/v1/accounting_doc.rb
+++ b/app/doc/open_api/v1/accounting_doc.rb
@@ -14,8 +14,15 @@ class OpenAPI::V1::AccountingDoc < OpenAPI::V1::BaseDoc
   doc_for :index do
     api :GET, "/#{API_VERSION}/accounting", 'Accounting lines'
     description 'All accounting lines, paginated (necessarily becauce there is a lot of data) with optional dates filtering. ' \
-                'Ordered by *date* descendant.<br><br>The field *status* indicates if the accounting data is being built ' \
-                'or if the build is over. Possible status are: <i>building</i> or <i>built</i>.'
+                'Ordered by *date* descendant.<br>' \
+                'The field *status* indicates if the accounting data is being built or if the build is over. ' \
+                'Possible status are: <i>building</i> or <i>built</i>.<br>' \
+                'The field *invoice.payment_details* is available if line_type=client. It will contain the following data:<br>' \
+                '· *payment_mean*, possible status are: <i>card</i>, <i>wallet</i> or <i>other</i>. *WARNING*: If an invoice was settled ' \
+                'using multiple payment means, this will only report the payment mean applicable to current line.<br>' \
+                '· *gateway_object_id*, if payment_mean=card, report the ID of the payment gateway related object<br>' \
+                '· *gateway_object_type*, if payment_mean=card, report the type of the payment gateway related object<br>' \
+                '· *wallet_transaction_id*, if payment_mean=wallet, report the ID of the wallet transaction<br>'
     param_group :pagination
     param :after, DateTime, optional: true, desc: 'Filter accounting lines to lines after the given date.'
     param :before, DateTime, optional: true, desc: 'Filter accounting lines to lines before the given date.'
@@ -38,9 +45,17 @@ class OpenAPI::V1::AccountingDoc < OpenAPI::V1::BaseDoc
               "reference": "22010009/VL",
               "id": 274,
               "label": "Subscription of Dupont Marcel for 1 month starting from 2022, january 2nd",
-              "url": "/open_api/v1/invoices/247/download"
+              "url": "/open_api/v1/invoices/247/download",
+              "payment_details": {
+                "payment_mean": "card",
+                "gateway_object_id": "pi_3MA2PPW4kx8QemzC02ABBEbo",
+                "gateway_object_type": "Stripe::PaymentIntent"
+              }
+            },
+            "user": {
+              "invoicing_profile_id": 6512,
+              "external_id": "U52-ALC4"
             },
-            "user_invoicing_profile_id": 6512,
             "debit": 1400,
             "credit": 0
             "currency": "EUR",
diff --git a/app/models/invoice.rb b/app/models/invoice.rb
index e94c3a65d..3edc9f54b 100644
--- a/app/models/invoice.rb
+++ b/app/models/invoice.rb
@@ -161,14 +161,15 @@ class Invoice < PaymentDocument
     when :card
       if paid_by_card?
         {
+          payment_mean: mean,
           gateway_object_id: payment_gateway_object.gateway_object_id,
           gateway_object_type: payment_gateway_object.gateway_object_type
         }
       end
     when :wallet
-      { wallet_transaction_id: wallet_transaction_id } if paid_by_wallet?
+      { payment_mean: mean, wallet_transaction_id: wallet_transaction_id } if paid_by_wallet?
     else
-      {}
+      { payment_mean: mean }
     end
   end
 
diff --git a/app/views/open_api/v1/accounting/index.json.jbuilder b/app/views/open_api/v1/accounting/index.json.jbuilder
index ddaa73e88..b0061e1eb 100644
--- a/app/views/open_api/v1/accounting/index.json.jbuilder
+++ b/app/views/open_api/v1/accounting/index.json.jbuilder
@@ -7,7 +7,7 @@ json.lines @lines do |line|
       json.extract! line.invoice, :reference, :id
       json.label Invoices::LabelService.build(line.invoice)
       json.url download_open_api_v1_invoice_path(line.invoice)
-      if @codes.values.include?(line.account_code)
+      if @codes.values.include?(line.account_code) # if this is a 'client' line
         mean = @codes.select { |_key, value| value == line.account_code }
         json.payment_details line.invoice.payment_details(mean.keys[0])
       end
diff --git a/test/integration/open_api/accounting_test.rb b/test/integration/open_api/accounting_test.rb
index 0d3ebb3fb..42c264a38 100644
--- a/test/integration/open_api/accounting_test.rb
+++ b/test/integration/open_api/accounting_test.rb
@@ -92,6 +92,7 @@ class OpenApi::AccountingTest < ActionDispatch::IntegrationTest
     assert lines[:lines].count.positive?
     assert(lines[:lines].all? { |line| line[:line_type] == 'client' })
     assert(lines[:lines].all? { |line| !line[:invoice][:payment_details].nil? })
+    assert(lines[:lines].all? { |line| %w[card wallet other].include?(line[:invoice][:payment_details][:payment_mean]) })
     assert(lines[:lines].filter { |line| line[:account_code] == card_code }
                         .none? { |line| line[:invoice][:payment_details][:gateway_object_id].nil? })
     assert(lines[:lines].filter { |line| line[:account_code] == card_code }