Marriages that are legally performed in a foreign country are usually valid in Canada, and you do not need to register them in Canada.
Marrying a citizen of another country may automatically make you a citizen of that country. This will not affect your Canadian citizenship, but your adopted country may not recognize your Canadian citizenship and may prevent Canadian consular officers from helping you. For more information, contact the nearest Canadian government office abroad or see our Travelling as a dual citizen page.
A marriage search letter is issued by the office responsible for registering marriages in the province or territory where you live. This document will confirm whether or not you have registered a marriage there. Some countries may require you to provide an authenticated marriage search letter before you can get married. Follow the steps to get your document authenticated.