Del. Code tit. 10 § 3511
All sales under this chapter shall be good against the defendant or the defendant's executors, administrators and assigns. Any transfer or assignment of the property after attachment shall be void, and after the sale of the property is made and confirmed the purchaser shall be entitled to and have all the right, title and interest of the defendant in and to the property so attached and sold, and such sale and confirmation shall transfer to the purchaser all the right, title and interest of the defendant in and to the property as fully as if the defendant had transferred the same to the purchaser in accordance with law. If action is brought against any officer or other person acting under the authority of this chapter, it shall be a good defense that his act was done in compliance with this chapter and in accordance with the applicable rules of court.
10 Del. C. § 3511