Look at the money before taking it...

I found a coin from El Salvador in the printing money envelope today...looks like a dime (round, small and silver), but with a 7-sided shape bevel inwards on the coin. Double check the money you get.

Also, can we get a bill marker to check authenticity of larger bills ($10's or $20's)? I know we don't get them often, but I did get a twenty the other day.

Thanks,

Eric