If, at the time of issuing a writ of attachment, or thereafter before the attachment issue has been tried, the attaching creditor shall suggest that any person is indebted to the debtor, or has property of the debtor in his hands, or knows of any other person so indebted or who has effects or property of the debtor in his hands, the officer issuing the writ of attachment shall insert therein a command to summon such person to appear on the return day of the attachment, to answer accordingly.
