Under the arrangement each certification body must give mutual recognition to any TickIT certification held. All certification bodies offering TickIT certification must use the TickIT guide as its reference document excepting those requirements that relate directly to the standard itself. Auditors carrying out TickIT certification and surveillance must meet the auditor performance standards set out in the TickIT guide. In the UK, certified companies are listed in the DTI Register of Assessed Companies. The DISC TickIT office also maintains a list of TickIT certificated companies.
Certification bodies maintain and publish their own lists.
It is important to note that certifications are carried out against scopes which may vary considerable. It is always important therefore for a potential purchaser to look closely at the defined scope of certification. The TickIT Guide to Software Quality Management System Construction and Certification using EN29001 was produced by IT professionals. It is a comprehensive document which includes the authoritative international standardisation guide ISO9000-3 Guidelines for the Application of ISO9001 to the Development, Supply and Maintenance of Software which explains what ISO9001 means in the context of information systems supply. In producing the guide, use of existing guidance material was made where possible, editing and updating it for TickIT purposes.