diff --git a/content/applications/sales/point_of_sale/payment_methods/terminals/vantiv.rst b/content/applications/sales/point_of_sale/payment_methods/terminals/vantiv.rst
index 44dca453f..d264299e4 100644
--- a/content/applications/sales/point_of_sale/payment_methods/terminals/vantiv.rst
+++ b/content/applications/sales/point_of_sale/payment_methods/terminals/vantiv.rst
@@ -9,6 +9,10 @@ ease the work of your cashiers.
    Please note MercuryPay only operates with US and Canadian banks, making
    this procedure only suitable for North American businesses.
 
+.. warning::
+   Vantiv card readers should be purchased exclusively from Vantiv, as certain Vantiv terminals
+   bought on Amazon do not include the correct encryption needed to be used with an Odoo database.
+
 Configuration
 =============