Merge pull request #39950 from frappe/mergify/bp/version-15-hotfix/pr…

…-39943

refactor: use popup to inform on additional reconciliation step for Cr/Dr Notes (backport #39943)

erpnext/controllers/accounts_controller.py

@@ -216,6 +216,18 @@ def validate(self):
 					)
 				)
 
+			if self.get("is_return") and self.get("return_against"):
+				document_type = "Credit Note" if self.doctype == "Sales Invoice" else "Debit Note"
+				frappe.msgprint(
+					_(
+						"{0} will be treated as a standalone {0}. Post creation use {1} tool to reconcile against {2}."
+					).format(
+						document_type,
+						get_link_to_form("Payment Reconciliation", "Payment Reconciliation"),
+						get_link_to_form(self.doctype, self.get("return_against")),
+					)
+				)
+
 			pos_check_field = "is_pos" if self.doctype == "Sales Invoice" else "is_paid"
 			if cint(self.allocate_advances_automatically) and not cint(self.get(pos_check_field)):
 				self.set_advances()