Our trip, this past January, was with my daughter and her family.
She is the one that got the PIN and she was the only one that could check us in and they did require her to show her Drivers license and we had to use a credit card with her name on it for all our incidentals. When I tried to check in, my daughter had gone to the rr with one of her kids, we were in the on-line check in line but the CM required that we wait for her to come back before we could check in so she could provide her drivers license and a credit card in her name.We had never traveled with a package booked with a PIN before so I can't compare it to prior trips but they were very specific to make sure the persons name that checked in matched the name on the PIN that was on the reservation.
I had heard/read that they had gotten much stricter with the usage of PIN's, ensuring the person that it was sent to/intended for was in the actual travel party since so many people were sharing PIN codes. I am here to say that they were definitely very thorough in making sure that the PIN matched my daughter and that she was definitely in our travel party.
But whose name was the ressie under - yours or daughters?
If I make the ressie under my name now using my SIL's pin, I doubt it would be an issue. If it was, I would do a chargeback on my visa for the difference.