Dealing with HMRC – guidance

Charities generic technical specifications

Charities repayments claims technical specifications for Charities Online software developers.


Government Gateway Submission Protocol: 3.1


Non form validation rules for the charities online service: 1.2

This file may not be suitable for users of assistive technology. Request an accessible format.

If you use assistive technology (eg a screen reader) and need a version of this document in a more accessible format, please email Please tell us what format you need. It will help us if you say what assistive technology you use.


Technical specifications for software developers working with the Charities Online service.