If you are applying for a job and the company is asking for some sort of verification or notarization, in some countries the US Consulate will do whatever is needed, because the requirements make no sense and what they want to be done can´t be done. In Japan, I had my diploma notarized, even though it was nonsense and there was nothing to notarize. In spite of the US government having notified the Japanese of this, they still insisted. They were under the impression that notarization implied some sort of investigation and was a big, big deal. The US just gave up.

If the copies of the diplomas you have are originals or you have been issued official duplicates with the embossed seal of the university on them, that is probably as good as you are going to get. I used official duplicates both times I applied for work permits because I wanted to retain my original and there is always the chance something will go wrong.

If you graduated recently, your university might have a way for you to order duplicates on line.