To prove your 245(i) eligibility, you do not need a copy of I-140 - the filing receipt should suffice. A copy of the labor certification application (that must have been filed and approved before your father's employer could have filed I-140 petition) would be helpful, and your attorney should be able to obtain it from USCIS or from the department of labor of the state where it was filed.
Answered on Jun 19th, 2013 at 5:21 PM