I am receiving an error with “This transaction can not be completed” message. How can I solve this?

I am receiving an error with “This transaction can not be completed” message. How can I solve this?

We need to verify your account in order to solve this error. Please click on the form and complete it with the information requested.

After receiving your request, we will verify your data and confirm it by e-mail with further instructions on how to avoid this error.