diff --git a/account_payment_order/models/account_move_line.py b/account_payment_order/models/account_move_line.py
index 0638c4ddc..0e2a6ff6f 100644
--- a/account_payment_order/models/account_move_line.py
+++ b/account_payment_order/models/account_move_line.py
@@ -48,6 +48,40 @@ class AccountMoveLine(models.Model):
             else:
                 ml.partner_bank_id = ml.partner_bank_id
 
+    def _get_linked_move_communication(self):
+        """
+        This will collect the references from referral moves:
+            - Reversal moves
+            - Partial payments
+        """
+        self.ensure_one()
+        references = []
+        # Build a recordset to gather moves from which references have already
+        # taken in order to avoid duplicates
+        reference_moves = self.env["account.move"].browse()
+        # If we have credit note(s) - reversal_move_id is a one2many
+        if self.move_id.reversal_move_id:
+            references.extend(
+                [
+                    move.payment_reference or move.ref
+                    for move in self.move_id.reversal_move_id
+                    if move.payment_reference or move.ref
+                ]
+            )
+            reference_moves |= self.move_id.reversal_move_id
+        # Retrieve partial payments - e.g.: manual credit notes
+        for (
+            _,
+            _,
+            payment_move_line,
+        ) in self.move_id._get_reconciled_invoices_partials():
+            payment_move = payment_move_line.move_id
+            if payment_move not in reference_moves and (
+                payment_move.payment_reference or payment_move.ref
+            ):
+                references.append(payment_move.payment_reference or payment_move.ref)
+        return references
+
     def _get_communication(self):
         """
         Retrieve the communication string for the payment order
@@ -71,13 +105,8 @@ class AccountMoveLine(models.Model):
                 elif "out" in self.move_id.move_type:
                     # Force to only put invoice number here
                     communication = self.move_id.payment_reference or self.move_id.name
-                # If we have credit note(s) - reversal_move_id is a one2many
-                if self.move_id.reversal_move_id:
-                    references = [
-                        move.payment_reference or move.ref
-                        for move in self.move_id.reversal_move_id
-                        if move.payment_reference or move.ref
-                    ]
+                references = self._get_linked_move_communication()
+                if references:
                     communication += " " + " ".join(references)
         return communication_type, communication
 
diff --git a/account_payment_order/tests/test_payment_order_outbound.py b/account_payment_order/tests/test_payment_order_outbound.py
index a7cbb552e..8383ec50b 100644
--- a/account_payment_order/tests/test_payment_order_outbound.py
+++ b/account_payment_order/tests/test_payment_order_outbound.py
@@ -86,7 +86,31 @@ class TestPaymentOrderOutboundBase(AccountTestInvoicingCommon):
 
         return invoice
 
-    def _create_supplier_refund(self, move):
+    def _create_supplier_refund(self, move, manual=False):
+        if manual:
+            # Do the supplier refund manually
+            vals = {
+                "partner_id": self.partner.id,
+                "move_type": "in_refund",
+                "ref": move.ref,
+                "payment_mode_id": self.mode.id,
+                "invoice_date": fields.Date.today(),
+                "invoice_line_ids": [
+                    (
+                        0,
+                        None,
+                        {
+                            "product_id": self.env.ref("product.product_product_4").id,
+                            "quantity": 1.0,
+                            "price_unit": 90.0,
+                            "name": "refund of 90.0",
+                            "account_id": self.invoice_line_account.id,
+                        },
+                    )
+                ],
+            }
+            move = self.env["account.move"].create(vals)
+            return move
         wizard = (
             self.env["account.move.reversal"]
             .with_context(active_model="account.move", active_ids=move.ids)
@@ -337,6 +361,15 @@ class TestPaymentOrderOutbound(TestPaymentOrderOutboundBase):
 
         self.refund.action_post()
 
+        # The user add the outstanding payment to the invoice
+        invoice_line = self.invoice.line_ids.filtered(
+            lambda line: line.account_internal_type == "payable"
+        )
+        refund_line = self.refund.line_ids.filtered(
+            lambda line: line.account_internal_type == "payable"
+        )
+        (invoice_line | refund_line).reconcile()
+
         self.env["account.invoice.payment.line.multi"].with_context(
             active_model="account.move", active_ids=self.invoice.ids
         ).create({}).run()
@@ -349,3 +382,37 @@ class TestPaymentOrderOutbound(TestPaymentOrderOutboundBase):
         self.assertEqual(len(payment_order.payment_line_ids), 1)
 
         self.assertEqual("F/1234 R1234", payment_order.payment_line_ids.communication)
+
+    def test_supplier_manual_refund(self):
+        """
+        Confirm the supplier invoice with reference
+        Create a credit note manually
+        Confirm the credit note
+        Reconcile move lines together
+        Create the payment order
+        The communication should be a combination of the invoice payment reference
+        and the credit note one
+        """
+        self.invoice.action_post()
+        self.refund = self._create_supplier_refund(self.invoice, manual=True)
+        with Form(self.refund) as refund_form:
+            refund_form.ref = "R1234"
+
+        self.refund.action_post()
+
+        (self.invoice.line_ids + self.refund.line_ids).filtered(
+            lambda line: line.account_internal_type == "payable"
+        ).reconcile()
+
+        self.env["account.invoice.payment.line.multi"].with_context(
+            active_model="account.move", active_ids=self.invoice.ids
+        ).create({}).run()
+
+        payment_order = self.env["account.payment.order"].search(self.domain)
+        self.assertEqual(len(payment_order), 1)
+
+        payment_order.write({"journal_id": self.bank_journal.id})
+
+        self.assertEqual(len(payment_order.payment_line_ids), 1)
+
+        self.assertEqual("F1242 R1234", payment_order.payment_line_ids.communication)