Would you believe a videotape? I doubt it. A photograph? Nah. How about an audiotape of someone speaking in ancient Sumerian? That wouldn't work either.
I know, how about a 2000-year-old, pigment-free, burial cloth bearing the negative image of a crucified man, which also contains grayscale, topographic information showing a three dimensional figure when processed with specialized NASA terrain-mapping equipment?
At least that would be hard to fabricate, since scientists don't know how it was done.