Here's a first, at least a first for me—but then, I don’t get out much. Took a lamp in to be repaired, the guy asked for my email address, typed it into a laptop, said he'd email my receipt.
I asked if any customers didn't want to give out their addresses. He said maybe one in a hundred doesn't have email, usually old folks. But few hesitate to furnish addresses-- "for those of course I give paper receipts."
Says the system "saves me about 2% a month." Two percent of what it only just occurred to me to wonder.