Regrettably, the University of Toronto does not issue copies of diplomas. Your diploma is a legal document. Therefore, the only copy of your diploma is the one that you received. Please take your original diploma to any local Notary Public* and they can provide you with a certified copy.
(*A Notary Public is a public official who can authenticate documents with a notarial seal. Many lawyers are also Notaries. A Notary Public is not equivalent to a Guarantor. Please contact a local law office in your area.)
The Office of Convocation can provide a Certification of Degree. This is a document printed on office letterhead that states your name, degree earned and date of Convocation. It is then signed and sealed by a University Official.