Curse of Unawareness
This consolation prize exists to take the sting out of knowing that you were there at the exact coordinates of the geohash, on the right day, but didn't know it. Perhaps you didn't have internet access in the morning, or you had to leave the house before the day's coordinates were published. You went about your daily business and later you had a chance to check them, only to discover that you almost certainly passed through those coordinates. They're right on your regular bus route. They're in the same mall where your sister dragged you through forty women's clothing and shoe stores. But you didn't know. So you have no proof. And now, needless to say, there is no opportunity to go back.
Well therein lies the problem, doesn't it? How do you prove you can't prove something? You can't. By way of proof for this achievement you are expected to provide a detailed account on that graticule's daily expedition page (i.e. YYYY-MM-DD LAT LONG) of why you were unable to realize you were at the geohash when you were, how you found out, why you couldn't go back, and the crazy but inadequate ways you thought of to try to prove it.
 Curse list
Here, this will make you feel better.
| This user earned the Curse of Unawareness Consolation Prize