diff --git a/addons/point_of_sale/i18n/point_of_sale.pot b/addons/point_of_sale/i18n/point_of_sale.pot
index cc5c41832de..701e441b302 100644
--- a/addons/point_of_sale/i18n/point_of_sale.pot
+++ b/addons/point_of_sale/i18n/point_of_sale.pot
@@ -6943,6 +6943,13 @@ msgid ""
 "                    Or you can add demo data for testing purpose. Please mind that this is an irreversible action."
 msgstr ""
 
+#. module: point_of_sale
+#. odoo-python
+#: code:addons/point_of_sale/models/pos_config.py:0
+#, python-format
+msgid "You can only have one cash payment method."
+msgstr ""
+
 #. module: point_of_sale
 #: code:addons/point_of_sale/models/pos_session.py:0
 #, python-format
diff --git a/addons/point_of_sale/models/pos_config.py b/addons/point_of_sale/models/pos_config.py
index 42200fe2cb1..74a739515d0 100644
--- a/addons/point_of_sale/models/pos_config.py
+++ b/addons/point_of_sale/models/pos_config.py
@@ -180,6 +180,13 @@ class PosConfig(models.Model):
         for config in self:
             config.cash_control = bool(config.payment_method_ids.filtered('is_cash_count'))
 
+    @api.onchange('payment_method_ids')
+    def _check_cash_payment_method(self):
+        for config in self:
+            if len(config.payment_method_ids.filtered('is_cash_count')) > 1:
+                config.payment_method_ids = config.payment_method_ids._origin
+                raise ValidationError(_('You can only have one cash payment method.'))
+
     @api.depends('company_id')
     def _compute_company_has_template(self):
         for config in self: