From last year:
http://www.gofuckyourself.com/showthread.php?t=716875
Only one Government Issued Id is required and that including more than one ID in
2257 records may actually violate the provision which requires that all
other non-required records be kept separate from 2257 records §75.2(e).
In addition, asking for a second ID may result in inconsistencies
between the two IDs. Please keep in mind that a clear, good-quality
photocopy of the ID must be attached to the form and the photocopy must
be signed in ink by the Model (If the ID does not contain a recent and
recognizable picture of the Model, only a Driver's License, State ID
Card or Military ID will be acceptable for U.S. Models and only a
passport will be acceptable for foreign Models).
Consult a lawyer blahblahblah...