Hello, I am Keith, one of the experts on Just Answer, and pleased to be able to help you with your question.
Who has asked you to have this letter sent? There is a possibility that this is the start of a scam.
\you may have problem there as it takes at least 16 years to change your domicile! Surely this bank will accept HMRC's letter that you are an UK resident. I have never heard the like and I have, in the past, received overseas dividends without having to disclose either residence or domicile. I small something fishy here.
The concept of fiscal residence is unknown in the UK. You are either resident or non resident for tax purposes. My wife has dual nationality and holds two passports, yet she has never been subjected to such treatment. Like you I can find nothing regarding proof of domicile save for ex pats or immigrants, of which you are neither. You will have to tell this bank, who appear to be run by either Donald Duck or Mickey Mouse, of the realities of your position.
A tax adviser would not be an authority on domicile in any event. This is a highly complex subject.
I am so sorry I cannot be of more assistance.
Post to clear my question list.