"I sent code 2 hrs after auction end; 5 days ... " (more) later buyer said it did not work. I confirmed it was a valid code and Kellogg's website indicated it was redeemed. I told buyer this. He responded, "...if you cannot find a way to fix the code i suggest that you send me another one. i may have used the code before but i cant keep track as i bid on alot of these codes on listia let me check my record history on the kelloggs website." -- never heard from him again. People really need to make sure they didn't get what they bid on before contacting seller. I did give buyer what he bid on and believe he redeemed it. I would rather block this person that have to deal with him again. :("