Coin won't go into set
Who do I contact to question why a coin in my inventory won't go into a set? I'm doing a 5-cent type set, and the last coin is 2006-present. I've got a 2019 in my inventory, but it won't go into the set. Thanks.
US and British coin collector, and creator of The Ultimate Chuck E. Cheese's and Showbiz Pizza Place Token & Ticket Guide