fix: allow to return expired batches using purchase return

erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py

@@ -1543,6 +1543,37 @@ class TestPurchaseInvoice(unittest.TestCase, StockTestMixin):
 		pi.save()
 		self.assertEqual(pi.items[0].conversion_factor, 1000)
 
+	def test_batch_expiry_for_purchase_invoice(self):
+		from erpnext.controllers.sales_and_purchase_return import make_return_doc
+
+		item = self.make_item(
+			"_Test Batch Item For Return Check",
+			{
+				"is_purchase_item": 1,
+				"is_stock_item": 1,
+				"has_batch_no": 1,
+				"create_new_batch": 1,
+				"batch_number_series": "TBIRC.#####",
+			},
+		)
+
+		pi = make_purchase_invoice(
+			qty=1,
+			item_code=item.name,
+			update_stock=True,
+		)
+
+		pi.load_from_db()
+		batch_no = pi.items[0].batch_no
+		self.assertTrue(batch_no)
+
+		frappe.db.set_value("Batch", batch_no, "expiry_date", add_days(nowdate(), -1))
+
+		return_pi = make_return_doc(pi.doctype, pi.name)
+		return_pi.save().submit()
+
+		self.assertTrue(return_pi.docstatus == 1)
+
 
 def check_gl_entries(doc, voucher_no, expected_gle, posting_date):
 	gl_entries = frappe.db.sql(

erpnext/stock/doctype/purchase_receipt/test_purchase_receipt.py

@@ -1241,6 +1241,37 @@ class TestPurchaseReceipt(FrappeTestCase):
 
 		self.assertEqual(query[0].value, 0)
 
+	def test_batch_expiry_for_purchase_receipt(self):
+		from erpnext.controllers.sales_and_purchase_return import make_return_doc
+
+		item = make_item(
+			"_Test Batch Item For Return Check",
+			{
+				"is_purchase_item": 1,
+				"is_stock_item": 1,
+				"has_batch_no": 1,
+				"create_new_batch": 1,
+				"batch_number_series": "TBIRC.#####",
+			},
+		)
+
+		pi = make_purchase_receipt(
+			qty=1,
+			item_code=item.name,
+			update_stock=True,
+		)
+
+		pi.load_from_db()
+		batch_no = pi.items[0].batch_no
+		self.assertTrue(batch_no)
+
+		frappe.db.set_value("Batch", batch_no, "expiry_date", add_days(today(), -1))
+
+		return_pi = make_return_doc(pi.doctype, pi.name)
+		return_pi.save().submit()
+
+		self.assertTrue(return_pi.docstatus == 1)
+
 
 def prepare_data_for_internal_transfer():
 	from erpnext.accounts.doctype.sales_invoice.test_sales_invoice import create_internal_supplier

erpnext/stock/doctype/stock_ledger_entry/stock_ledger_entry.py

@@ -153,6 +153,9 @@ class StockLedgerEntry(Document):
 
 	def validate_batch(self):
 		if self.batch_no and self.voucher_type != "Stock Entry":
+			if self.voucher_type in ["Purchase Receipt", "Purchase Invoice"] and self.actual_qty < 0:
+				return
+
 			expiry_date = frappe.db.get_value("Batch", self.batch_no, "expiry_date")
 			if expiry_date:
 				if getdate(self.posting_date) > getdate(expiry_date):