Tanzania - Tanzanian shilling
The Tanzanian shilling is subject to in- and export regulations. For that reason it´s almost impossible to exchange Tanzanian shilling outside of the country. The best option is to exchange new US 100 dollar notes in mint condition prior to travel. These can easily be exchanged to shilling upon arrival in Tanzania. Smaller US dollar notes might be handy as well for tipping and smaller expenses, for example visa charges.