I ask for one if I suspect they’ll get my order wrong and I have a paper trail.

I scan all my receipts and keep a digital record so that someday I can look back through them all and chart the prices of things I regularly purchased over time

Also useful for the occasional class action

In grocery stores I usually say no because I’m not gonna return my carrots and I don’t want them to waste ink and paper. Unfortunately a lot of stores print the receipt either way and immediately throw it into the trash if you say no.

My response is usually “Sure, I can always use an alibi!”

If you’re gonna repost something from ifunny, at least crop the watermark off.