Question for ImmCanada -Thanks

Dear ImmCanada,

I am working on my Canadian Green Card Application. I currently have four years professional work experience in the US, which gets 21 points on my qualification. Previously, I worked professionally in my country for two years in the past ten years. I already have notarized employment contract and original reference from my current employer as supporting document. Since I already have supporting documents for four years work experience (21 points), do I still have to get notarized employment contract and original reference from my prior employer back in my country?

Thank you very much your help in this matter.

Eric H