We just do sanity checks on values of donations to make sure the person put the right amount. One year a lovely woman donated a very dear old violin and said it was worth 36.75 because that was the cost of it when her great grand father had it comissioned. We helped her out and got her in touch with an appraiser because clearly she didnt know what she had. Another guy went to donate a comic book and in poor penmanship it looked like he wrote 2500. And he meant 25$. The local artist is just colorful creativity and we all adore him and he always says he has to try to donate a million dollar piece. It is almost a standing game anymore.
And we are required to itemize our reciepts to buyers that say they PURCHASED x item at a charity auction and y is the street value leaving a donation of y for said item. The disclaimer is listed as well. Our tax attorneys are very clear how we are to list things on reciepts at auctions, one group clears about 1.5M in their christmas gala so we gotta do it right. It isnt a gift with donation as many do, these are outright auctions.
Returning to topic.