In other cases how property delivered to purchaser

When the property sold is in the possession of any person other than the judgment-debtor, or is a debt due by any person to the judgment-debtor, delivery thereof to the purchaser shall be made by a written notice to such person, prohibiting him from delivering possession of the property or paying the debt to any person except the purchaser, and whatever right the judgment-debtor had in such property or debt at the time of attachment shall vest in the purchaser.