Guys,Guys, they didn't ask for a receipt when I filled out the form. They will probably ask for a photo of the 4K/UHD defaced when they're ready to ship out new discs. That's what they did with the Rosemary's Baby 4K/UHD replacement.
I'm wrong about the defacing of the old 4K/UHD because I kept the old Rosemary's Baby 4K/UHD in a sleeve and it's not defaced at all. Perhaps, I'm thinking of Criterion when I received a replacement 4K/UHD for The Princess Bride.