It's a funny moment. I bought dollars at this exchange office. On the same day, I had to exchange a $ 20 bill, but they refused to take it, because there are some spots, i.e. they gave it to me less than a day ago, but they refuse to take it, and the same person at the checkout. Why does a bank sell bills with a so-called defect if it does not accept the same bills later? I handed it over in another branch, another bank without any problems.