You should keep the score sheets in case there is a protest by a handler after the fact. I have seen handlers protesting the decision to the AKC after the fact. If you have your score sheet and can prove that the numbers don't work out, the AKC will stand behind you. In one case I chaired an event where a handler sent us a video of what they considered passing work. The judges both had their score sheets and were able to explain why the trainability score didn't reach a qualifying score. We hope that no one ever waits until after an event to question the judges' decision, but it does happen.