From USCIS website, I found that they are sending us a notice to ask for additional evidence from my wife's I485. Do you know what kind of evidence is usually required?
Information about our case:
Center: TSC.
My I-140 was approved in 2003, and I submitted I-485 for my wife and myself on November 2003. Shortly after that, TSC asked us to send the I140 approval for my wife's application. Actually, we have submitted it at the first palce, anyway, we still sent them another copy. Then, almost two years later, they are asking for more evidence. I really don't know what kind of evidence it should be.