Users are usually worry about the payment information they send through the internet. They fear fraud and they want their personal information to be safe.

"an essential usability task is to make users feel safe…"

Probably you are already implementing ways of safely transfer user information to your website, like Secure Socket Layer (SSL). But an essential usability task is to make users feel safe when sending critical data.

Place a lock icon close to critical forms, big or small but in highly visible location. Another way of encouraging people to give you that valuable information is to place a link to your privacy policy.


PayPal wants to transmit a feeling of safety to its users through a smart design.

 
Amazon also tries to give a feeling of security from the beginning.