When a member clicks on the "Insert card" button (Level 8 access), a message is displayed:
Please do not insert entries for cards with missing foil, wrong or blank backs, or that are mis-cut. These are not catalogued here as they are printing errors and are due to random misfires during the printing process.
Blank fronts fall into that same category as the blank backs.
If you are concerned because you were trying to get an accurate count of your Thurman Thomas cards, what you can do is start another collection and call it "Blank Fronts". Then add all of your blank front cards to that collection, and add it in with the other one to get your count. (I know you joined the site well before multiple collections happened, and you may have missed their introduction back in early Decemeber.)
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).