北卡的due dilligence period/fee

http://rpdrealty-charlotte.com/due-diligence-period-in-north-carolina/

As stated above, the NC due diligence period is a negotiated duration of time that the buyer has to determine whether or not to proceed with a purchase. As with all negotiations, there can be a fee, payable to the seller, associated with the due diligence period. Bear in mind that during the due diligence period the buyer may walk away from the property for any or no specific reason and receive back all earnest money submitted with the offer. In return for this flexibility to walk away even weeks into the DDP a [negotiable] non-refundable due diligence fee may be required by the seller. If the buyer decides to purchase the home, the due diligence fee is credited to the buyer’s side of the HUD-1 statement at the closing. If the the buyer does not close the due diligence fee is forfeited to the seller.