Only software solutions that have passed rigorous testing and approval processes are able to connect to Bacstel-IP or in the case of Faster Payments - Secure-IP. And only software solution suppliers who have proved their software meets these requirements are authorised to use the appropriate Bacs approved software service logo. View the current list of Bacs approved software suppliers. If you would like to become a Bacs approved software supplier find out more details of the approval process.