The DTTP1 can be used to apply for a Double Taxation Treaty passport by a company or other fiscally opaque entity resident in a country with which the UK has a double taxation treaty that provides for relief from UK Income Tax on interest arising in the UK.
Email HMRC to ask for this form in Welsh (Cymraeg).
Before you start
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Double Taxation Treaty passport Scheme
Guidance on how the scheme applies to overseas companies and borrowers. How to apply and tell HMRC about changes.