Avoid payment defaults by using CRIF Order Check products.
Fill orders on behalf of the customer
This module recognizes the customers when logging in if they last ordered as a guest. Since the customers do not have access data, you can react with 4 options:
Send letters from your OXID eShop Admin
Endereco Services verify, correct and optimize the address data in realtime, directly the moment your customers entering them in your webshop.