The old style Print@home had to be printed, passengers had to nominate a form of ID which had to be brought on the journey, and some TOCs made it difficult or impossible to make changes.
For as long as I've been using them the VTEC/LNER ones have just said:
"This ticket is only valid when presented with a valid form of ID issued in the name of the person holding the ticket: Credit Card, Debit Card, National Railcard, Passport, National ID Card or Driving License."
No need to nominate a form of ID in advance - they just make you confirm the name of the passenger as part of the booking process. (I don't doubt that it may have been like that at one time, but it hasn't been the case on VTEC/LNER for quite some time.)
I've had them from other TOCs too over the last couple of years - and never had to nominate ID.