The bpost Shipping Manager handles privacy related content such as name, phone number, email address and addresses of consumers. As this information needs to be handled on the most secured way, they are encrypted by using the https protocol. 

As the Shipping Manager is using this secured protocol while being loaded into an iFrame in your webshop, when returning to a webshop that uses the non encrypted http protocol, a warning message may be shown to the visitor explaining him that he/she will be returned to an insecure environment. 

In order to prevent such a warning message, we encourage webshops to buy an SSL certificate and to install it in the entire checkout phase of their webshop, also including the Shipping Manager step. For more information about installing SSL certificates, https & http, contact your hosting company. They will be able to assist you further.