At JMCH, re: photocopies.
Thank you for posting that bit of advice. I was going to post something similar if nobody else had.
I always request the paper receipt, take it home, lay it on the scanner, & save a copy to my archive. The physical copy goes in the receipts folder for tax purposes, the archived version to be printed out if the physical gets too faint for my sighted helpers to read.
If I need to return something I'll open the archive, send a copy to the printer, & take the copy with me instead - it's almost certainly going to be a clear version for them to deal with, at least according to my sighted minions when asked "Is this readable or does my printer need ink again?"
Enjoy a pint & have a good day...