Good question there.
From my understanding, the lender is not really part of the contract. The Ratified Contract is between the Seller (the homw owner, borrower from bank) and the Buyer, the lender is just 3rd party to approved the sale. So, as long as if the Buyer has Ratified Contract from the Seller of the property dated before 4/30/10 and if the closing occurs before the date of 6/30/10, the Buyer will be qualified for the tax credit of $8,000. And of course, the Buyer must be qualified in the limitation of the tax credit guideline. Hope this helps*_*