From the official Twitter page of the Shroud Exposition 2015 maintained by sindone.org of the Diocese of Turin:
You have memories of the previous expositions of # Shroud ? We will post photos and more meaningful stories, write to ricordi@sindone.org
(translation by Google)
In other words, if you have been to Turin and seen the shroud, ricordi@sindone.org wants to hear from you. Send photos.