VRM14000 | What to do when refusing a claim
From HM Revenue & Customs · VAT Refunds Manual
Whenever a claim is refused, either in whole or in part, you must ensure that
you tell the claimant in writing that the claim has been refused,
you explain why the claim is being refused,
you tell the claimant about their right to ask for a review of the decision and of their right to appeal to the Tax Tribunal (under section 83(c) or (t)) – see VRM15000, and
you tell the claimant that they have 30 days from the date of the letter in which to lodge an appeal.
You should not invite further discussion in a decision letter – see the decision of the VAT & Duties Tribunal in John Martin Group (VAT Tribunal Decision 19257); [2006] BVC 2045.