I wonder what it would take for a retailer to take the plunge and abolish paper receipts? (ie. Offer them only at customer request.)
As a consumer, I’d be happy to be rid of them.
I’d also be happy to eliminate signatures… I like the debit-card transaction which requests your PIN at the point of purchase. Even my gas station requires my PIN (or sometimes zip code) when using my debit card at the pump (I always say ‘no’ to the inevitable ‘would you like a printed receipt’ question.)