Whenever you want to check the identity of your customers, play it safe with the BitPayment GmbH. We send an unlock code to your customers indicated in the reference field of a money transfer. This code must then be entered by your customers on your website. This way you can make sure that your customer has access to his account, which he has specified on your website. This way you can for example verify the authorship of comments and ratings or the authenticity of the account.