So, I need to renew my passport, but it seems the standard renewal process involves mailing your old one in along with the paperwork.
Is there any danger (as far as being dinged by the FAA/company LCA) in not having your passport in your possession, if you can prove you're in the process of having it renewed?
Or, I suppose a better question may be, is there a different process anyone knows of, in which you can retain your old passport until the new comes in?