Based on my limited knowledge, it wouldn't be worth it at this time. Just keep it safe and crisp and maybe you'll have some good luck.
Unless you want to certify that it truly is an ink smear (and I don’t think that is questionable), it is not worth the cost. Just keep it in a nice rigid holder. Typically ink smear errors do not sell for a great deal of money.
Best to just keep as is and put in a pvc free plastic bill holder. It’s not worth your cost to certify it.