A certified copy does NOT mean a plain photocopy. A certified copy is a duplicate verified to be a true and faithful copy of an original by an authorized signatory such as a notary public.
When you graduated you may have received a certified copy from your school: a copy with stamps and signatures on it. In order for us to process your application, we need a certified copy of your diploma and transcript of records so that we know you did graduate from your school. Please note: a copy of the certified copy is no longer a certified copy!