I will be traveling with my sister who just passed her road test and will be turning 21 two weeks before we leave. Right now she has a paper ID without a photo. We are unsure if the one that will be mailed to her will expire on her birthday like her permit does. On the paper ID it says not to go to the DMV until a photo ID has been mailed to you. I'm afraid that she won't have a govenment picture ID for the plane. She will have her paper ID and either an expired permit or drivers licence depending on if she gets it with the same expiration date. Will she be able to get on the plane with a govenment issued paper ID if she doesn't get her picture ID in time for the trip? Sorry for such a long question! 
