It is possible but highly unlikely. Most kids have put their yearbook down before summer and it ends up in a box somewhere only to be looked at again years later.
In Beverly's case she got it out and figured she could add the signature that was on her divorce papers, cuz it looked legit, and she then could cash in.
Hm...a handwriting expert named Arthur Anthony says the signature belongs to Roy Moore. And for someone to forge such a relatively-long sentence would be very difficult. The added information was undoubtedly not done by Moore, but the rest of it looks genuine.