diff --git a/addons/om_fiscal_year/models/res_company.py b/addons/om_fiscal_year/models/res_company.py
new file mode 100644
index 0000000..0f52adb
--- /dev/null
+++ b/addons/om_fiscal_year/models/res_company.py
@@ -0,0 +1,38 @@
+from odoo import api, fields, models, _
+from odoo.exceptions import RedirectWarning, ValidationError
+
+
+class ResCompany(models.Model):
+    _inherit = 'res.company'
+
+    def _validate_fiscalyear_lock(self, values):
+        if values.get('fiscalyear_lock_date'):
+            draft_entries = self.env['account.move'].search([
+                ('company_id', 'in', self.ids),
+                ('state', '=', 'draft'),
+                ('date', '<=', values['fiscalyear_lock_date'])])
+            if draft_entries:
+                error_msg = _(
+                    'There are still unposted entries in the period you want to lock. You should either post or delete them.')
+                action_error = {
+                    'view_mode': 'list',
+                    'name': 'Unposted Entries',
+                    'res_model': 'account.move',
+                    'type': 'ir.actions.act_window',
+                    'domain': [('id', 'in', draft_entries.ids)],
+                    'search_view_id': [self.env.ref('account.view_account_move_filter').id, 'search'],
+                    'views': [[self.env.ref('account.view_move_tree').id, 'list'],
+                              [self.env.ref('account.view_move_form').id, 'form']],
+                }
+                raise RedirectWarning(error_msg, action_error, _('Show unposted entries'))
+
+            unreconciled_statement_lines = self.env['account.bank.statement.line'].search([
+                ('company_id', 'in', self.ids),
+                ('is_reconciled', '=', False),
+                ('date', '<=', values['fiscalyear_lock_date']),
+                ('move_id.state', 'in', ('draft', 'posted')),
+            ])
+            if unreconciled_statement_lines:
+                error_msg = _("There are still unreconciled bank statement lines in the period you want to lock."
+                              "You should either reconcile or delete them.")
+                raise ValidationError(error_msg)