As part of the closing process, you're likely to sign numerous affidavits. You may be required, for example, to sign an affidavit of occupancy. It states that you will use the property as a principal residence. Or, you and the seller may have to sign an affidavit stating all of the improvements to the property required in the sales contract were completed before closing.
Your lender can provide additional information regarding any of these documents you will sign.