政府部门有多年CPP供款档案记录,也是佐证
常出国超过6个月的护照要保留
What documents will I need to provide?
If you were not born in Canada, you must prove your legal status in Canada with your citizenship or immigration documents. If you have not lived continuously in Canada after turning age 18, you must submit proof of all the dates you arrived in or left Canada for periods of over six months. You can do this by providing your passports, visas, airline, ship, and bus tickets, and other documents that prove your residence history in Canada.
When official documents are not available, you may submit other documents such as school and census records, letters from employers, and contracts (mortgage, lease, etc.).
Contact us for more examples of acceptable proof.
If you no longer have your original immigration documents, Service Canada may be able to obtain information from Immigration, Refugees and Citizenship Canada on your behalf. To do so, you must complete, sign and return the Consent to Exchange Information with Citizenship and Immigration Canada (ISP3210) with your OAS application.