If you have social security credits in both the United States and Canada, you may be eligible for benefits from one or both countries. Introduction. An agreement effective August 1, 1984, between the United States and Canada improves Social Security protection for people.Agreement between the Government of the United States of America and the Government of Canada with respect to Social Security. Explains the purpose of Canada's social security agreements and provides access to all of the forms related to these agreements. To file a claim for US or Canadian benefits under the Agreement, follow the instructions in "Claims for benefits" section. Canada and Costa Rica are signatories to the Convention on the Transfer of Sentenced Persons. An official website of the United States government. Here's how you know. Explore the best banking services with IBC across Oklahoma and Texas. Flexible banking so you can do more at your convenience.