From 8f9db3c72d3245d9c10efee867494bbb3bba928b Mon Sep 17 00:00:00 2001
From: "mergify[bot]" <37929162+mergify[bot]@users.noreply.github.com>
Date: Wed, 3 Jun 2026 14:11:25 +0530
Subject: [PATCH] Avoid status updation for purchase invoice from paid to
 unpaid by issuing a paid debit note against it (backport #54382) (#55576)

Co-authored-by: Shllokkk <140623894+Shllokkk@users.noreply.github.com>
---
 .../purchase_invoice/purchase_invoice.js      | 19 +++++++++++
 .../purchase_invoice/purchase_invoice.py      | 34 ++++++++++++++++---
 erpnext/controllers/accounts_controller.py    |  2 +-
 3 files changed, 50 insertions(+), 5 deletions(-)

diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js
index 9b0cf76aee5..68dc8d26d1b 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js
@@ -591,6 +591,25 @@ frappe.ui.form.on("Purchase Invoice", {
 			};
 		});
 
+		frm.set_query("write_off_account", function (doc) {
+			return {
+				filters: {
+					report_type: "Profit and Loss",
+					is_group: 0,
+					company: doc.company,
+				},
+			};
+		});
+
+		frm.set_query("write_off_cost_center", function (doc) {
+			return {
+				filters: {
+					is_group: 0,
+					company: doc.company,
+				},
+			};
+		});
+
 		frm.fields_dict["items"].grid.get_field("deferred_expense_account").get_query = function (doc) {
 			return {
 				filters: {
diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
index a7ef9f1414d..5323c93eaca 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
@@ -290,6 +290,7 @@ class PurchaseInvoice(BuyingController):
 		self.validate_expense_account()
 		self.set_against_expense_account()
 		self.validate_write_off_account()
+		self.validate_write_off_cost_center()
 		self.validate_multiple_billing("Purchase Receipt", "pr_detail", "amount")
 		self.set_status()
 		self.validate_purchase_receipt_if_update_stock()
@@ -659,6 +660,27 @@ class PurchaseInvoice(BuyingController):
 		if self.write_off_amount and not self.write_off_account:
 			throw(_("Please enter Write Off Account"))
 
+		if not self.write_off_account:
+			return
+
+		doc = frappe.db.get_value(
+			"Account", self.write_off_account, ["report_type", "is_group", "company"], as_dict=True
+		)
+
+		if not doc or doc.report_type != "Profit and Loss" or doc.is_group or doc.company != self.company:
+			throw(_("Please enter a valid Write Off Account"))
+
+	def validate_write_off_cost_center(self):
+		if not self.write_off_cost_center:
+			return
+
+		doc = frappe.db.get_value(
+			"Cost Center", self.write_off_cost_center, ["is_group", "company"], as_dict=True
+		)
+
+		if not doc or doc.is_group or doc.company != self.company:
+			throw(_("Please enter a valid Write Off Cost Center"))
+
 	def check_prev_docstatus(self):
 		for d in self.get("items"):
 			if d.purchase_order:
@@ -739,6 +761,7 @@ class PurchaseInvoice(BuyingController):
 
 	def validate_for_repost(self):
 		self.validate_write_off_account()
+		self.validate_write_off_cost_center()
 		self.validate_expense_account()
 		validate_docs_for_voucher_types(["Purchase Invoice"])
 		validate_docs_for_deferred_accounting([], [self.name])
@@ -852,7 +875,9 @@ class PurchaseInvoice(BuyingController):
 		if update_outstanding == "No":
 			update_voucher_outstanding(
 				voucher_type=self.doctype,
-				voucher_no=self.return_against if cint(self.is_return) and self.return_against else self.name,
+				voucher_no=self.return_against
+				if (cint(self.is_return) and self.return_against)
+				else self.name,
 				account=self.credit_to,
 				party_type="Supplier",
 				party=self.supplier,
@@ -1546,6 +1571,9 @@ class PurchaseInvoice(BuyingController):
 	def make_payment_gl_entries(self, gl_entries):
 		# Make Cash GL Entries
 		if cint(self.is_paid) and self.cash_bank_account and self.paid_amount:
+			against_voucher = self.name
+			if self.is_return and self.return_against and not self.update_outstanding_for_self:
+				against_voucher = self.return_against
 			bank_account_currency = get_account_currency(self.cash_bank_account)
 			# CASH, make payment entries
 			gl_entries.append(
@@ -1560,9 +1588,7 @@ class PurchaseInvoice(BuyingController):
 						if self.party_account_currency == self.company_currency
 						else self.paid_amount,
 						"debit_in_transaction_currency": self.paid_amount,
-						"against_voucher": self.return_against
-						if cint(self.is_return) and self.return_against
-						else self.name,
+						"against_voucher": against_voucher,
 						"against_voucher_type": self.doctype,
 						"cost_center": self.cost_center,
 						"project": self.project,
diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index 09029405e65..110b4834611 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -182,7 +182,7 @@ class AccountsController(TransactionBase):
 		if not get_meta(self.doctype).has_field("outstanding_amount"):
 			return
 
-		if self.get("is_return") and self.return_against and not self.get("is_pos"):
+		if self.get("is_return") and self.return_against and not (self.get("is_pos") or self.get("is_paid")):
 			against_voucher_outstanding = frappe.get_value(
 				self.doctype, self.return_against, "outstanding_amount"
 			)