We rented a car from Alamo week ago and after searching everywhere inside the car, there was no hang tag. I gave attendant my ressie printout, (had no coupons so did online checkin) DL, & CC. He scanned something on the cars window. This way they can eliminate some paper by not having hang tags anymore. I'm sure National &
Enterprise are both doing same thing since all same company.
Kiosk is quick and simple to use. As OP wrote, just give attendant paperwork from kiosk, DL & CC and have coupon handy just in case they want.