Can you explain the white background inside certain letters? Where did the security motif go? If they took microfiche and printed the data onto security paper there wouldn’t be white background inside certain letters. The fact that there is white background inside certain letters, particularly in the signatures on the “parent” line indicates tampering, above and beyond the pixel analysis others have shared. With all due respect, it has nothing to do with the history of photocopying.
Yes, it’s explainable with ease. There’s two layers you’re conflating: one the black text, backed by the “security motif” generated with white gradations to render the overlaid black text more readable. Somebody was trying to be nice.