From 4875c428e434dd45cf3c737a5fdba002a0cd1878 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Mon, 13 Apr 2026 17:30:06 +0200
Subject: [PATCH] Render prepaid amount in UBL invoice

Closes #14766
---
 modules/edocument_ubl/CHANGELOG                 |  1 +
 modules/edocument_ubl/edocument.py              | 11 +++++++++++
 modules/edocument_ubl/template/2/CreditNote.xml |  3 ++-
 modules/edocument_ubl/template/2/Invoice.xml    |  3 ++-
 4 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/modules/edocument_ubl/CHANGELOG b/modules/edocument_ubl/CHANGELOG
index 315289c72f..b1d4a0f6a1 100644
--- a/modules/edocument_ubl/CHANGELOG
+++ b/modules/edocument_ubl/CHANGELOG
@@ -1,3 +1,4 @@
+* Render prepaid amount
 * Fill invoice source amounts instead of checking amounts
 * Filter the MIME type of the additional documents allowed by the specification
 * Use VATEX as tax exemption reason code
diff --git a/modules/edocument_ubl/edocument.py b/modules/edocument_ubl/edocument.py
index ae20bbc20e..6944e8f648 100644
--- a/modules/edocument_ubl/edocument.py
+++ b/modules/edocument_ubl/edocument.py
@@ -271,6 +271,17 @@ class Invoice(Model):
                         return
                 return product.unece_allowance_charge_code
 
+    @cached_property
+    def prepaid_amount(self):
+        def balance(line):
+            if self.invoice.currency == line.second_currency:
+                return line.amount_second_currency
+            elif self.invoice.currency == self.invoice.company.currency:
+                return line.debit - line.credit
+            else:
+                return 0
+        return sum(map(balance, self.invoice.lines_to_pay))
+
     @classmethod
     def parse(cls, document):
         pool = Pool()
diff --git a/modules/edocument_ubl/template/2/CreditNote.xml b/modules/edocument_ubl/template/2/CreditNote.xml
index bdf1a9a423..2179db01a9 100644
--- a/modules/edocument_ubl/template/2/CreditNote.xml
+++ b/modules/edocument_ubl/template/2/CreditNote.xml
@@ -124,7 +124,8 @@ this repository contains the full copyright notices and license terms. -->
     <py:if test="this.invoice.total_amount != (this.invoice.untaxed_amount + this.invoice.tax_amount)">
         <cbc:PayableRoundingAmount py:attrs="{'currencyID': this.invoice.currency.code}">${-(this.invoice.total_amount - this.invoice.untaxed_amount - this.invoice.tax_amount)}</cbc:PayableRoundingAmount>
     </py:if>
-    <cbc:PayableAmount py:attrs="{'currencyID': this.invoice.currency.code}">${-this.invoice.total_amount}</cbc:PayableAmount>
+    <cbc:PrepaidAmount py:if="this.prepaid_amount" py:attrs="{'currencyID': this.invoice.currency.code}">${-this.prepaid_amount}</cbc:PrepaidAmount>
+    <cbc:PayableAmount py:attrs="{'currencyID': this.invoice.currency.code}">${-this.invoice.total_amount + this.prepaid_amount}</cbc:PayableAmount>
 </cac:LegalMonetaryTotal>
 <cac:CreditNoteLine py:for="line_id, line in enumerate(this.lines, 1)">
     <cbc:ID>${line_id}</cbc:ID>
diff --git a/modules/edocument_ubl/template/2/Invoice.xml b/modules/edocument_ubl/template/2/Invoice.xml
index be9cc7ddba..56de7a1431 100644
--- a/modules/edocument_ubl/template/2/Invoice.xml
+++ b/modules/edocument_ubl/template/2/Invoice.xml
@@ -124,7 +124,8 @@ this repository contains the full copyright notices and license terms. -->
     <py:if test="this.invoice.total_amount != (this.invoice.untaxed_amount + this.invoice.tax_amount)">
         <cbc:PayableRoundingAmount py:attrs="{'currencyID': this.invoice.currency.code}">${this.invoice.total_amount - this.invoice.untaxed_amount - this.invoice.tax_amount}</cbc:PayableRoundingAmount>
     </py:if>
-    <cbc:PayableAmount py:attrs="{'currencyID': this.invoice.currency.code}">${this.invoice.total_amount}</cbc:PayableAmount>
+    <cbc:PrepaidAmount py:if="this.prepaid_amount" py:attrs="{'currencyID': this.invoice.currency.code}">${this.prepaid_amount}</cbc:PrepaidAmount>
+    <cbc:PayableAmount py:attrs="{'currencyID': this.invoice.currency.code}">${this.invoice.total_amount - this.prepaid_amount}</cbc:PayableAmount>
 </cac:LegalMonetaryTotal>
 <cac:InvoiceLine py:for="line_id, line in enumerate(this.lines, 1)">
     <cbc:ID>${line_id}</cbc:ID>