I phoned the bank and credit card agency to tell them we are going to be out of the country. It was interesting talking to the customer service agents.
"Where are you going on vacation?"
"Gee... I've never heard of that. Can you spell that?"
It probably also doesn't help to explain that it is north of South Africa. So for the readers who don't know exactly where Namibia is located, here is a map of Africa from World Atlas.
Here is detailed map of Namibia.