Hello,
You need to send the originals in the university sealed envelop.
"EDUCATION/TRAINING/QUALIFICATIONS
For you and your spouse or common-law partner: � Post-secondary education documents: vocational or technical certificates or diplomas; � College or university documents: certification of completion and the graduation degree, diploma, or certificate issued by the college or university and the evaluation committee; � Transcripts: original transcripts of all degrees must be submitted in university-sealed envelopes. � Professional qualifications certificates: notarized professional qualifications certificates should be submitted if available. (e.g., Engineer, Computer Programmer, Accountant, Economist, Translator/Interpreter, Architect etc.)
"
I don't think that you need to worry about the Hague convention. The degree should be accredited by authorities from country of issuance.
Hope this helps.
Cheers
Mezo