diff --git a/addons/at_accounting/models/res_partner.py b/addons/at_accounting/models/res_partner.py
new file mode 100644
index 0000000..d5fbe9d
--- /dev/null
+++ b/addons/at_accounting/models/res_partner.py
@@ -0,0 +1,70 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import api, fields, models, _
+
+
+class ResPartner(models.Model):
+    _name = 'res.partner'
+    _inherit = 'res.partner'
+
+    account_represented_company_ids = fields.One2many('res.company', 'account_representative_id')
+
+    def _get_followup_responsible(self):
+        return self.env.user
+
+    def open_partner_ledger(self):
+        action = self.env["ir.actions.actions"]._for_xml_id("at_accounting.action_account_report_partner_ledger")
+        action['params'] = {
+            'options': {'partner_ids': self.ids, 'unfold_all': len(self.ids) == 1},
+            'ignore_session': True,
+        }
+        return action
+
+    def open_partner(self):
+        return {
+            'type': 'ir.actions.act_window',
+            'res_model': 'res.partner',
+            'res_id': self.id,
+            'views': [[False, 'form']],
+            'view_mode': 'form',
+            'target': 'current',
+        }
+
+    @api.depends_context('show_more_partner_info')
+    def _compute_display_name(self):
+        if not self.env.context.get('show_more_partner_info'):
+            return super()._compute_display_name()
+        for partner in self:
+            res = ""
+            if partner.vat:
+                res += f" {partner.vat},"
+            if partner.country_id:
+                res += f" {partner.country_id.code},"
+            partner.display_name = f"{partner.name} - " + res
+
+    def _get_partner_account_report_attachment(self, report, options=None):
+        self.ensure_one()
+        if self.lang:
+            # Print the followup in the customer's language
+            report = report.with_context(lang=self.lang)
+
+        if not options:
+            options = report.get_options({
+                'partner_ids': self.ids,
+                'unfold_all': True,
+                'unreconciled': True,
+                'hide_account': True,
+                'all_entries': False,
+            })
+        attachment_file = report.export_to_pdf(options)
+        return self.env['ir.attachment'].create([
+            {
+                'name': f"{self.name} - {attachment_file['file_name']}",
+                'res_model': self._name,
+                'res_id': self.id,
+                'type': 'binary',
+                'raw': attachment_file['file_content'],
+                'mimetype': 'application/pdf',
+            },
+        ])