EDIT: This freebie from April has returned with a new code: J2L6
9K2P isn't much of a code, is it? Sounds more like a partial license plate you saw as a car peeled out of the parking lot. Or was it 2PK9? I'm already confused and I didn't even witness this imaginary bank heist.
Thankfully what I do know is that the code will give you access to a free Crest 3D FlexFit Whitestrips sample. You should get a signup form after submitting the code.