IHTA84/S143 applies where
The requirements
The request need not be in writing, but it should have been
made in terms sufficiently certain for a court to have given effect
to it had it been binding. Cases in which a legatee has made a
transfer allegedly in pursuance of a non-binding request, but the
existence or effect of the wish appears to be uncertain, should be
referred at an early stage to TG.
If the request is not complied with, it has no IHT
consequences.