I don't have any sort of horse in this race, but I downloaded the auction photo and played with the color balance of 'yellow' to see what we could learn. Here's the result…
yellowaaron.jpg
Based on this, you can easily see how the yellow (basically the bright green in the image) seems to be all crazy-scribbled-in around Hank's name and not at all what a professional print job would look like. Take it for what it's worth.