diff --git a/modules/purchase_trade/docs/fees.md b/modules/purchase_trade/docs/fees.md
index a0d0545..cfb653f 100644
--- a/modules/purchase_trade/docs/fees.md
+++ b/modules/purchase_trade/docs/fees.md
@@ -49,3 +49,15 @@ Le recalcul est declenche apres:
 `stock.shipment.in.validate()` recalcule deja le PnL depuis les lots du
 shipment, mais ce workflow ne couvre pas les changements de fee saisis apres
 coup dans l'onglet Fees.
+
+## Fee Report
+
+La colonne `Purchase` du Fee Report vient exclusivement du lot lie au fee
+(`fee.lots -> lot.line -> purchase.line.purchase`). Le purchase technique
+stocke sur `fee.fee.purchase`, cree pour facturer le service, ne doit jamais
+etre presente comme le contrat d'achat metier.
+
+Les statuts d'invoicing et de paiement des lots suivent les lots effectifs du
+fee. Le statut de paiement du fee consolide sa facture et son eventuelle
+DN/CN; il est `Paid` seulement si tous les documents concernes sont payes et
+`Partially paid` des qu'au moins un paiement existe sans paiement complet.
diff --git a/modules/purchase_trade/fee.py b/modules/purchase_trade/fee.py
index f0ea47f..58a5e1c 100755
--- a/modules/purchase_trade/fee.py
+++ b/modules/purchase_trade/fee.py
@@ -1548,6 +1548,21 @@ class FeeReport(
     r_inv = fields.Function(fields.Many2One('account.invoice',"Invoice"),'get_invoice')
     r_dn_cn = fields.Function(fields.Many2One('account.invoice',"DN/CN"),
         'get_dn_cn')
+    r_lot_invoice_status = fields.Function(fields.Selection([
+        ('not', 'Not invoiced'),
+        ('partial', 'Partially invoiced'),
+        ('invoiced', 'Invoiced'),
+        ], "Lot invoicing"), 'get_lot_invoice_status')
+    r_lot_payment_status = fields.Function(fields.Selection([
+        ('not', 'Not paid'),
+        ('partial', 'Partially paid'),
+        ('paid', 'Paid'),
+        ], "Lot payment"), 'get_lot_payment_status')
+    r_fee_payment_status = fields.Function(fields.Selection([
+        ('not', 'Not paid'),
+        ('partial', 'Partially paid'),
+        ('paid', 'Paid'),
+        ], "Fee payment"), 'get_fee_payment_status')
     r_state = fields.Selection([
         ('not invoiced', 'Not invoiced'),
         ('invoiced', 'Invoiced'),
@@ -1580,6 +1595,80 @@ class FeeReport(
         fee = Fee(self.id)
         dn_cn = getattr(fee, 'dn_cn', None)
         return getattr(dn_cn, 'id', dn_cn)
+
+    @staticmethod
+    def _unique_invoices(invoices):
+        unique = []
+        keys = set()
+        for invoice in invoices:
+            if not invoice or getattr(invoice, 'state', None) == 'cancelled':
+                continue
+            key = getattr(invoice, 'id', None) or id(invoice)
+            if key not in keys:
+                keys.add(key)
+                unique.append(invoice)
+        return unique
+
+    @classmethod
+    def _lot_invoice_data(cls, fee):
+        lots = fee._get_effective_fee_lots()
+        invoices = []
+        invoiced_lots = 0
+        for lot in lots:
+            lot_invoices = []
+            for name in ('invoice_line', 'invoice_line_prov'):
+                line = getattr(lot, name, None)
+                if line:
+                    lot_invoices.append(getattr(line, 'invoice', None))
+            lot_invoices = cls._unique_invoices(lot_invoices)
+            if lot_invoices:
+                invoiced_lots += 1
+                invoices.extend(lot_invoices)
+        return lots, invoiced_lots, cls._unique_invoices(invoices)
+
+    @staticmethod
+    def _invoice_payment_status(invoices):
+        if not invoices:
+            return 'not'
+        statuses = []
+        for invoice in invoices:
+            payment_lines = list(
+                getattr(invoice, 'payment_lines', None) or [])
+            if not payment_lines:
+                statuses.append('not')
+            elif (getattr(invoice, 'state', None) == 'paid'
+                    or getattr(invoice, 'amount_to_pay', None) == 0):
+                statuses.append('paid')
+            else:
+                statuses.append('partial')
+        if all(status == 'paid' for status in statuses):
+            return 'paid'
+        if any(status != 'not' for status in statuses):
+            return 'partial'
+        return 'not'
+
+    def get_lot_invoice_status(self, name):
+        Fee = Pool().get('fee.fee')
+        lots, invoiced_lots, _ = self._lot_invoice_data(Fee(self.id))
+        if not lots or not invoiced_lots:
+            return 'not'
+        if invoiced_lots == len(lots):
+            return 'invoiced'
+        return 'partial'
+
+    def get_lot_payment_status(self, name):
+        Fee = Pool().get('fee.fee')
+        _, _, invoices = self._lot_invoice_data(Fee(self.id))
+        return self._invoice_payment_status(invoices)
+
+    def get_fee_payment_status(self, name):
+        Fee = Pool().get('fee.fee')
+        fee = Fee(self.id)
+        invoices = self._unique_invoices([
+            fee.get_invoice('inv'),
+            getattr(fee, 'dn_cn', None),
+            ])
+        return self._invoice_payment_status(invoices)
 
     def get_shipment_origin(self, name):
         if self.r_shipment_in:
@@ -1626,16 +1715,19 @@ class FeeReport(
         pl = PurchaseLine.__table__()
         SaleLine = Pool().get('sale.line')
         sl = SaleLine.__table__()
+        Lot = Pool().get('lot.lot')
+        lot = Lot.__table__()
 
         fee_lot_lines = (
             fl
-            .join(pl, 'LEFT', condition=fl.line == pl.id)
-            .join(sl, 'LEFT', condition=fl.sale_line == sl.id)
+            .join(lot, 'LEFT', condition=fl.lot == lot.id)
+            .join(pl, 'LEFT', condition=lot.line == pl.id)
+            .join(sl, 'LEFT', condition=lot.sale_line == sl.id)
             .select(
                 fl.fee.as_('fee'),
-                Min(fl.line).as_('purchase_line'),
+                Min(lot.line).as_('purchase_line'),
                 Min(pl.purchase).as_('purchase'),
-                Min(fl.sale_line).as_('sale_line'),
+                Min(lot.sale_line).as_('sale_line'),
                 Min(sl.sale).as_('sale'),
                 group_by=[fl.fee]))
         
@@ -1655,8 +1747,8 @@ class FeeReport(
             wh &= (fr.fee_counterparty == party)
         if fee_type:
             wh &= (fr.fee_type == fee_type)
-        purchase_expr = Coalesce(fee_lot_lines.purchase, fr.purchase)
-        purchase_line_expr = Coalesce(fee_lot_lines.purchase_line, fr.line)
+        purchase_expr = fee_lot_lines.purchase
+        purchase_line_expr = fee_lot_lines.purchase_line
         sale_expr = fee_lot_lines.sale
         if purchase:
             wh &= (purchase_expr == purchase)
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index 4b34f66..e4adc28 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -5863,6 +5863,63 @@ class PurchaseTradeTestCase(ModuleTestCase):
         fee_model.browse.assert_called_once_with([10])
         fee_model.invoice.assert_called_once_with(fees)
 
+    def test_fee_report_lot_invoice_status_uses_effective_lots(self):
+        'fee report consolidates invoicing over the effective linked lots'
+        FeeReport = Pool().get('fee.report')
+        invoice = SimpleNamespace(id=1, state='posted')
+        invoiced = SimpleNamespace(
+            invoice_line=SimpleNamespace(invoice=invoice),
+            invoice_line_prov=None)
+        not_invoiced = SimpleNamespace(
+            invoice_line=None, invoice_line_prov=None)
+        fee = SimpleNamespace(
+            _get_effective_fee_lots=lambda: [invoiced, not_invoiced])
+
+        lots, count, invoices = FeeReport._lot_invoice_data(fee)
+
+        self.assertEqual(lots, [invoiced, not_invoiced])
+        self.assertEqual(count, 1)
+        self.assertEqual(invoices, [invoice])
+
+    def test_fee_report_payment_status_consolidates_invoice_payments(self):
+        'fee report marks mixed paid and unpaid invoices as partially paid'
+        FeeReport = Pool().get('fee.report')
+        paid = SimpleNamespace(
+            state='paid', payment_lines=[SimpleNamespace()],
+            amount_to_pay=Decimal('0'))
+        unpaid = SimpleNamespace(
+            state='posted', payment_lines=[],
+            amount_to_pay=Decimal('10'))
+
+        self.assertEqual(
+            FeeReport._invoice_payment_status([paid, unpaid]), 'partial')
+        self.assertEqual(FeeReport._invoice_payment_status([paid]), 'paid')
+        self.assertEqual(FeeReport._invoice_payment_status([unpaid]), 'not')
+
+    def test_fee_report_payment_status_includes_fee_dn_cn(self):
+        'fee payment status consolidates the invoice and its DN/CN'
+        FeeReport = Pool().get('fee.report')
+        report = FeeReport()
+        report.id = 10
+        paid = SimpleNamespace(
+            id=1, state='paid', payment_lines=[SimpleNamespace()],
+            amount_to_pay=Decimal('0'))
+        unpaid_dn_cn = SimpleNamespace(
+            id=2, state='posted', payment_lines=[],
+            amount_to_pay=Decimal('5'))
+        fee = Mock(dn_cn=unpaid_dn_cn)
+        fee.get_invoice.return_value = paid
+        fee_model = Mock(return_value=fee)
+
+        with patch('trytond.modules.purchase_trade.fee.Pool') as PoolMock:
+            PoolMock.return_value.get.return_value = fee_model
+
+            self.assertEqual(
+                report.get_fee_payment_status('r_fee_payment_status'),
+                'partial')
+
+        fee.get_invoice.assert_called_once_with('inv')
+
     def test_sale_report_converts_mixed_units_for_total_and_words(self):
         'sale report totals prefer the virtual lot unit as common unit'
         Sale = Pool().get('sale.sale')
diff --git a/modules/purchase_trade/view/fee_report_list.xml b/modules/purchase_trade/view/fee_report_list.xml
index b0e35dc..507e347 100755
--- a/modules/purchase_trade/view/fee_report_list.xml
+++ b/modules/purchase_trade/view/fee_report_list.xml
@@ -14,4 +14,7 @@
     <field name="r_state" width="80"/>
     <field name="r_inv" width="90"/>
     <field name="r_dn_cn" width="90"/>
+    <field name="r_lot_invoice_status" width="110"/>
+    <field name="r_lot_payment_status" width="110"/>
+    <field name="r_fee_payment_status" width="110"/>
 </tree>