there is a certain question on the 217[i think that's the application form] that if you answer truthfully you will be rejected for the 15% tax on your income as outlined in the tax treaty with mexico and canada.
we were declared as "factual"residents of alberta.so we pay income tax as if we still lived there. since we file jointly nothing is witheld on my cpp nor will it be witheld on my oap when i start getting it in july.
we pay less than 15% this way even tho we are fm3 residents of mexico and have no assets in canada except our banking and the various pensions we get.
you apply for cpp and oap 6 months before you are eligable.