Agreement between the Government of the United States of America and the Government of Canada with respect to Social Security. Agreement on Social Security Between Canada and the Kingdom of Denmark.E102172 - CTS 1986 No. 10. Application for Canadian Old Age, Retirement and Survivors benefits under the Agreement on Social Security between. Canada and the United States. If you have questions about totalization agreements, call the Social Security Administration's Office of International Programs at 4109657306. If you have questions about totalization agreements, call the Social Security Administration's Office of International Programs at 4109657306. A certificate of coverage is used to inform the other country that the worker is covered under the Canada Pension Plan. Guide for Completing an Application for Canada Pension Plan. The Totalization Agreement allows U.S. workers to combine work experience in the U.S. and Canada to qualify for social security.