Beyond Cash Register Honesty

I don't know if I am assuming too much but I think we all want to pay less than full price. Or more clearly, we all want to receive a discount. I love a discount as much as the next person.
But here is what happened to me that is a little twist on the un-wanted discount.

As a good steward of the earth's resources you walk into a big coffee shop with your mug in hand. You order a drip coffee and the barista fills it up with room for cream. The barista in the green apron then charges you for a tall when your cup is a grande size.

What would you do? Would you correct the barista and ask them to charge you more?

This happened to me not once but twice.

Now, you may rationalize to yourself that this large company makes so much money that they don't need it. Or have some grand scale of justice in your mind of the number of times you paid more than you should have. Just for this blog, let's set aside your own thoughts about the profits of said company as well as your idea about the eternal scales of justice.

What would your response be in the moment? In that split second when you need to pay the money.

When it happened the first time I wondered if I was making too big a deal of forty-five cents?

I am sure there are many things to consider but these are the questions that come to mind.

Am I willing to have the barista short change the owner of the business? Personally, if I can't be truthful at the most basic level, the cash register honesty level, what other areas am I willing to cut corners?
Full disclosure, this has happened before and I didn't say a thing, didn't even bat an eyelash.

How does your Character Matter in the moment when the person ringing you up charged you incorrectly, intentionally?

So on both occasions I told the barista that it was a grande and not a tall size. The second incident the barista responded, "Oh, that's okay." I replied back, "No, I want to do what's right."

This Character Matter issue is Truthfulness versus Deception. Truth in the inward parts versus just letting the transaction go unaddressed for my sake and the owner of the coffee shop.