Letters will be available for pick-up at the ISSO front desk after PM two business days after submission. What should the letter say?This page provides you with the current information you need to successfully navigate immigration and program requirements at OU as an international student. Use this template to create your own letter of support for family members as they apply for a visitor visa. Please click the PDF for more instructions. We will reopen for normal business hours on Thursday, January 2nd. NOTE: Please allow 15 business days for all e-form processing. The Traffic clerk's offices are open daily Monday through Friday between the hours of a.m.