i did have a chance to finally use mine from paypal. simple, i can actually see on the phone screen what I'm doing.
my local vet uses hers when she does my critters, and she has a tiny printer in her truck so i get a nice detailed receipt after her visits. i would think she would start with blank sheets with letterhead and logo already preprinted as i would guess the portable printer would not be very "ink" friendly.
i need to check out her printer.