(a) Notice of the attachment shall also be given to the defendant whenever practicable. If the defendant is a person, such writ may either be served upon the defendant personally or by leaving a copy thereof at the defendant's usual place of abode within New Castle County more than 6 days before the return thereof in the presence of an adult person, and if the defendant is a corporation, such writ may either be served personally on the president or 1 of the directors thereof or by leaving a copy thereof at its principal place of business in New Castle County more than 6 days before the return thereof in the presence of an adult person, or if the person does not reside in New Castle County, or if the corporation has no place of business in New Castle County, a copy thereof may be mailed in a sealed postpaid envelope directed to the last known address or place of business of the defendant more than 6 days before the return thereof.
(b) The day of mailing shall be deemed and taken as the day of the giving of the notice, but the failure to give the notice shall not divest the court or the justice of the peace before whom the proceedings were instituted of jurisdiction to hear and determine the proceedings.