Wait, I think you might be mixing up two different things. The envelope thing is usually about cashing a check, not about getting a receipt for something you bought. I mean, maybe they ate the envelope without the receipt inside, but that's a whole different kind of frustrating. Your mileage may vary, but I've had places just not hand over a receipt unless you ask twice. It's like they're trying to save a tree one slip of paper at a time.

And there I thought volunteering was supposed to make me feel GOOD about myself, not like I needed a manager for my bean sorting skills. Guess I should have checked the official Bean Hierarchy Chart before I started.

Feel for you, those internet life hacks always sound way easier than they actually are. I tried the same thing a few years back with a super cheap popper I found, and my kitchen looked like a snow globe exploded. At least you got a wild story out of it for three bucks.