diff --git a/erpnext/regional/doctype/fec_import_document/fec_import_document.py b/erpnext/regional/doctype/fec_import_document/fec_import_document.py
index c0c34000ddbf7a3cb449126cdbf1e0efc0ff50fc..9db8d853e8937cc3bc0f8148852357adfa120888 100644
--- a/erpnext/regional/doctype/fec_import_document/fec_import_document.py
+++ b/erpnext/regional/doctype/fec_import_document/fec_import_document.py
@@ -126,7 +126,7 @@ class FECImportDocument(Document):
 		row.account = accounts.get(row.comptenum)
 
 	def get_party(self, row):
-		if not row.compauxnum or (row.party_type and row.party):
+		if row.party_type and row.party:
 			return
 
 		journal_type = frappe.get_cached_value("Accounting Journal", row.accounting_journal, "type")
@@ -135,12 +135,32 @@ class FECImportDocument(Document):
 		compte_aux = None
 		compte_aux_type = None
 		if journal_type in ("Sales", "Bank") or account_type == "Receivable":
-			if compte_aux := frappe.db.exists("Customer", row.compauxnum):
+			if compte_aux := (
+				frappe.db.exists("Customer", row.compauxnum)
+				or frappe.db.get_value(
+					"Party Account",
+					dict(company=self.company, account=row.account, parenttype="Customer"),
+					"parent",
+				)
+			):
 				compte_aux_type = "Customer"
-		elif journal_type in ("Purchase", "Bank") or account_type == "Payable":
-			if compte_aux := frappe.db.exists("Supplier", row.compauxnum):
+
+		if (journal_type == "Purchase" or account_type == "Payable") or (
+			not compte_aux and journal_type == "Bank"
+		):
+			if compte_aux := (
+				frappe.db.exists("Supplier", row.compauxnum)
+				or frappe.db.get_value(
+					"Party Account",
+					dict(company=self.company, account=row.account, parenttype="Supplier"),
+					"parent",
+				)
+			):
 				compte_aux_type = "Supplier"
 
+		if not row.compauxnum and not (compte_aux and compte_aux_type):
+			return
+
 		if account_type in ["Receivable", "Payable"] and not (compte_aux and compte_aux_type):
 			if account_type == "Receivable":
 				compte_aux_type = "Customer"