My wife will eventually be one of those who has an indefinite DLA award who will be invited to apply for PIP because she gets confused due to her medication etc I am wondering so we are prepared what do they actually ask the claimant when the DWP ring them to ask them to claim for PIP?
It doesn't quite work like that the initial contact will be in the form of a letter inviting your wife to claim PIP, although we often use the word "transfer" in the forum it really isn't one, rather a new claim from scratch.
Have a look at the PIP Claim guide for more details about the process and what the claimant needs to. See