Okla. Stat. tit. 12, § 1183
The garnishee may be examined by the judgment creditor either by deposition or by written interrogatories. The garnishee's deposition may be taken or interrogatories issued at any time after the service of the garnishee summons. If the garnishee be a corporation any principal officer thereof may be so examined. Within twenty (20) days after the filing of the answer affidavit by the garnishee, the judgment creditor may file and serve interrogatories on the garnishee concerning any matter contained in the answer or germane to any liability on the garnishee's part to the principal defendant. Attached to any interrogatories or notice of deposition shall be a statement that upon failure to answer or appear, a judgment may be taken against the garnishee as by default for the amount of the judgment and costs which the judgment creditor shall recover against the defendant in the principal action, together with costs of such garnishment, and that the garnishee may also be proceeded against as for contempt. A copy of the interrogatories and such statement shall be served upon the garnishee or the garnishee's attorney of record in the manner provided for service of summons and shall be returned with proof of service within five (5) days from the date of filing or within ten (10) days when served in another county and the garnishee within ten (10) days of the date of such service shall file with the clerk, full and true answers to all such interrogatories, verified by affidavit.
R.L. 1910, § 4833; Amended by Laws 1965, HB 877, c. 297, § 13; Amended by Laws 1995, HB 1324, c. 338, § 15, eff. November 1, 1995.