I was an employee of an Italian firm in Nigeria. They could not pay me as there was a delay in the Nigerian Government paying them for the contract.
Some tax was paid to the Nigerian Government, but only on a local allowance. These earnings were sent from a bank in Switzerland, and I don't think tax was paid. All the monies were earned before I returned to the Uk. I don't have any paperwork, but could possibly get some from the company.