From the Model Mayhem FAQ:

How do I find a credit I already sent someone?
From the new view of My Stuff, click Credits, and then select “My Credits” from the left side navigation menu. You should see a "Sort and Filter" button at the top of the page. Click that, set your parameters, and then click "Apply.

This sort function should allow you to see all the credits you have, including any that are unverified either by you or by the person you sent them to. It should look like this: