I once helped a woman living here in US to collect OAS from canada after she moved from canada in 1959.
She is entitled to 1/40th of the regular OAS for every year after she turned 18 and lived iN canada. So if born in 1938 and lived in canada until 1966, she would be entitled to 10/40th (since she turned 18 in 1956) of the regular monthly OAS.
Now, to collect this OAS while living outside Canada, she would normally need to have lived 20 years as an adult in canada. If she did, all she has to do is contact Service canada.
http://www.servicecanada.gc.ca/eng/isp/ ... ide3.shtmlIf she lived less than 20 years as an adult in canada, she needs to use her Social security history to collect OAS while outside canada. She would get in touch with the Social security office in her town, with the information below, and they will get the ball rolling.
http://www.ssa.gov/international/Agreem ... anada.htmlThe OAS rules say that they only start paying OAS for the months after you first post your claim (not from 65 if you've delayed), but I've found that they usually do it retroactively to the month you turned 65.
So, the big question is when did she live in Canada?