Struggling to Contact

Hello.

I sent in my paperwork for MENSA (it was an IQ test inside of a mental health battery) and they emailed me back saying that it wasn't valid because it needed to be an original copy (? I got it over email so IDK how much more original it can be) or notarized (what does that even mean in this case?)
I don't know what I need to do to get them to accept my paperwork and I sent them an email asking about it a couple weeks ago and didn't get ahold of them.