The Paperwork
For some reason, as humans, we need to refer to documents. These are not photographs, but tangible, physical things, usually in the form of paper and print, sometimes with embossment or official registration.
When did you ever place your identity to these things--and how far away can you get?
I have found that documents are often so byzantine in their nature that they have since become useless, and interchangeably used in any way I want to.