New Computerised Transit System: testing services
Email HMRC if you're a software developer testing the New Computerised Transit System.
Only use these email addresses for NCTS testing.
Give the test declaration number used from the test pack and the Local Reference Number (LRN) or Master Reference Number (MRN) in your email, if you have them.
Send EDIFACT messages for NCTS GB tests: [email protected]
Send EDIFACT messages for NCTS Italy tests: [email protected]
Send a manual intervention message: [email protected]
If HMRC needs to contact you about anything confidential they鈥檒l reply by phone or post.
Find out about HMRC service availability and issues.
Related content
Use the New Computerised Transit System
Software development for HMRC: detailed information
Updates to this page
Published 14 May 2025