Also possible that there may have been multiple in the household if so many were printed and mailed out? Maybe they turned the real one in for the prize money and then kept a non-winning one in a scrap book? Memories over time are weird so they could’ve convinced themselves that they kept the real one
Have you thought of trying to pick up another language? Started learning Spanish 4 years ago and now I can go on vacation and have conversations with locals. Also, I’m more interested in their local history because I can read it/listen to it in Spanish and practice the language at the same time.