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HMRC internal manual

Inheritance Tax Manual

HM Revenue & Customs
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Communications: Outgoing correspondence: envelopes

The post room will normally use window envelopes unless

  • the correspondence is too bulky because of enclosures
  •  By Recorded Delivery’/‘By Registered Post’ (IHTM02117) is to be noted above the address
  • the letter is ‘Private and Confidential’.