A postal order, either crossed or open is only valid for a period of? by Sunday | Jul 24 | Commerce WAEC | 0 comments A. 12 months B. 10 months C. 8 months D. 6 months E. 5 months Correct Answer: Option D – 6 months Users Also Read These:The commission on a postal order is?A postal service that allows a company's customers…Would you include all or any of the following under…Which of the following is the safest means of…A crossed postal order is?