Is it necessary to provide a notarized copy of my degree for a second yearly non-B visa extension in Thailand?

For a second yearly non-b visa extension, my agency is asking to get notarized copy of my degree from the embassy once again (did it before to get a non-b, but don't have a copy of that paper now).

Is it really necessary? I understand that some policies could be strange, but my degree hasn't changed, it's the same as it was before, and somewhere in the immigration office they keep this document.

Or you need to prove that your degree is real every year to get an extension?