Agreement between the Government of the United States of America and the Government of Canada with respect to Social Security. Must complete an application form.The form is available on the website. You can use the Payments. Download International Social Security Agreements forms (You will first need to select your country on the page). You must complete a Certification of Social Security Denial Status Form (DDS-351). This form is available at the Customer Service Centers. 1. All peoples have the right of self-determination. USAID's investments help achieve sustainable development progress, advancing our collective security, health, and prosperity. To get Form SS5 or to find out if you're eligible to get an SSN, go to SSA.