“An Application for an order under Rule 1 must be made ex parte supported by an affidavit – (a) identifying the judgment or order to be enforced and stating the amount remaining unpaid under it at the time of the application, and (b) stating that to the best of the information or belief of the deponent the garnishee (naming him) is within the jurisdiction and is indebted to the judgment debtor and stating the source of the deponent’s information and the grounds of his belief.”