A person to whom a receipt has been transferred, but not negotiated, acquires thereby, as against the transferer, the title to the grain, subject to the terms of any agreement with the transferer. If the receipt is nonnegotiable such person also acquires the right to notify the warehouseman of the transfer to him of such receipt, and thereby to acquire the direct obligation of the warehouseman to hold possession of the grain for him, according to the terms of the receipt. Prior to the notification of the warehouseman by the transferer of a nonnegotiable receipt, the title of the transferee to the grain and the right to acquire the obligation of the warehouseman may be defeated by the levy of an attachment or execution upon the grain by a creditor of the transferer, or by a notification to the warehouseman by the transferer or a subsequent purchaser from the transferer of a subsequent sale of the grain by the transferer.