IHTM28311 | Liabilities: investigating form IHT419: purpose of the form
From HM Revenue & Customs · Inheritance Tax Manual
Supplementary form IHT419 is enclosed with the IHT400 where the taxpayers are claiming a deduction from the deceased’s estate for particular types of debt. These are
loans from friends and relatives ()
money spent on behalf of the deceased by a close friend or relative ()
other loans or overdrafts ()
guarantee debts ().
It should also be completed where may apply to restrict the deduction () for a debt. Broadly speaking this is where the deceased has both borrowed money from someone and has made a gift to that same person.