Should it appear from the garnishee's answer, or otherwise, that the garnishee has in his possession, or had when the writ was served, any effects of the defendant liable to execution, including any certificates of stock in any corporation or joint stock company, the court shall render a decree ordering sale of such effects under execution in satisfaction of plaintiff's judgment and directing the garnishee to deliver them, or so much thereof as shall be necessary to satisfy plaintiff's judgment, to the proper officer for that purpose.