Spending Coins With Obsolete Designs/Denominations

As noted here in the past, I worked in a coin shop for many years and ended up with a sizeable amount of it's inventory when it closed. Included were thousands of cull Indian cents, V-nickels and Buffs. I've since spent all the nickels, but still put back around 2 rolls of low-grade or problem Indian cents into circulation every year, with a long way to go. I would happily give them away free to anyone who asks, but the postage costs these days are prohibitive.

I've seen cashiers question whether silver certificates are fakes.