Bacs Approved Software Service
Welcome to the Bacs approved software supplier document library, where you can find our most commonly used documents in one easy-to-access location.
Some documents are protected, so to access these you will need to make sure you are logged in to your account. If you do not have an account yet and are an eligible Bacs approved Software Supplier, you will need to register for your password access.
Once logged in, please note this is not an exhaustive list of documents you may need. To find more information, please use our search function or access the guide and rules.

DDIC Challenge Process - Service User Guide
DDIC Challenge Process - Service User Guide

The Service User's Guide and Rules to the Direct Debit Scheme - PDF version
The Service User's Guide and Rules to the Direct Debit Scheme

The Service User's Guide and Rules to the Bacs Direct Credit Scheme - PDF version
The Service User's Guide and Rules to the Bacs Direct Credit Scheme

Electronic funds transfer - file structures
Record and file structures for electronic funds transfer (EFT) data input to and output from Bacs services

Bacstel‐IP service technical specification
Process and protocols for a supplier that wants to develop Approved Software for the Bacstel‐IP service