By default, the system automatically sends the access QR Codes and those for the Digital Audio Guides within 48/24 hours prior to the date booked, however, if on the day of your visit you have not yet received them yet, after also checking your spam box, you can go to https://myqr.basilicasanpietro.va to retrieve them independently.
The self-recovery service only works on the date of the visit and, and to proceed, you will need to enter some information found on your booking confirmation voucher.