It depends on the type of mortgage. For most mortgages, lenders are required to count a payment for student loans regardless of the status of repayment.
Maybe. Your first call should be to the title company or attorney that handled your closing. In the DC, Maryland and Virginia metropolitan area, many title companies hold money in escrow from the seller to pay the final water bill.
Very unlikely. Mortgage underwriters will review bank statements looking for any large deposits or automatic withdrawals going to pay undisclosed debt. In the process of reviewing bank statements, an underwriter