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diff --git a/addons/l10n_us/models/__init__.py b/addons/l10n_us/models/__init__.py
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index 00000000..170b11ae
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+++ b/addons/l10n_us/models/__init__.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import res_partner_bank
diff --git a/addons/l10n_us/models/res_partner_bank.py b/addons/l10n_us/models/res_partner_bank.py
new file mode 100644
index 00000000..c46e0d63
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+++ b/addons/l10n_us/models/res_partner_bank.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+import re
+from odoo import fields, models, api, _
+from odoo.exceptions import ValidationError
+
+
+class ResPartnerBank(models.Model):
+    _inherit = 'res.partner.bank'
+
+    aba_routing = fields.Char(string="ABA/Routing", help="American Bankers Association Routing Number")
+
+    @api.constrains('aba_routing')
+    def _check_aba_routing(self):
+        for bank in self:
+            if bank.aba_routing and not re.match(r'^\d{1,9}$', bank.aba_routing):
+                raise ValidationError(_('ABA/Routing should only contains numbers (maximum 9 digits).'))