It is a waste of my time and intelligence to maliciously bash people and/or their opinions. However, I am going to voice this fact one time only in this particular forum.
For all holders of foreign currency, be it ZIM, Dong, Dinar, etc. There are licensed and bonded agencies where you can exchange your currency. i.e. banks such as HSBC, Chase, Wells Fargo. There are also Exchange Centers i.e. Bretton Woods, Currency Exchange International, etc. You do not require a special 800 number. What you do require is common sense i.e. pick up the phone and make an appointment with your bank, if you plan to exchange a large amount of currency and/or you don’t want to wait in line.
If you know of an actual licensed and bonded Redemption Center (not a bank or currency exchange) please feel free to post it here in response. I would be interested in calling them.