It used to happen to me all the time- I’d put it on the dashboard, slam the door and the receipt would go flying. What I got into the habit of doing is leaving one of the back doors open while I close the front door and then slowly closing the back door (and double and triple checking the dashboard). Sure it’s a pain but it’s less of a pain than fighting a ticket.
I’m not the only one who has that issue, a friend of @bein_hasidorim had that problem on a date, luckily she had lip gloss to stick it to the dashboard (not sure what he does now as if I remember correctly the trick worked but not the date).