Undocumented, as we all know, doesn't mean someone who's lost his papers, but an illegal, who never had legal residence in the first place.
One of the jokes in the Late Night Roundup [1]did was this from Jay Leno [2]:
If you left your driver's license at home, you are "undocumented:" if you're driving without a license, you're a criminal. [6]
I remember hearing a story about a detective who was asked for spare change by a vagrant.
He showed the guy his badge, and aked him for his ID, and the vagrant said "Er, sorry, I left my wallet on my dresser at home."
The cop said "I've heard that so often, [7] that sometimes I think there's a dresser somewhere in this town with a pile of wallets on it three feet high."
He was wrong: it's in Guadalajara.
Links:
[1] http://blog.vdare.com/archives/2006/05/09/late-night-with-reconquista/
[2] http://blog.vdare.com/archives/2005/08/16/jay-leno-on-immigration/
[3] http://www.vdare.com/fulford/041126_unbearable.htm
[4] http://www.vdare.com/fulford/how_to_write.htm
[5] http://www.vdare.com/guzzardi/ids.htm
[6] http://www.rockymountainnews.com/drmn/opinion_columnists/article/0,2777,DRMN_23972_4677323,00.html
[7] http://www.google.com/search?hl=en&lr=&safe=off&c2coff=1&q="left my wallet" dresser &btnG=Search