While discussing and finalizing plans for this years trip to Namibia, my PH friend asked me to remind everyone that IF they intend to settle out their final bill and pay staff tips in US dollars cash to be 100% certain you bring the "new" style $100.00 with the blue security stripe and not the old style. He reminded me that a couple years ago that the Namibian banks and currency exchange offices will NOT accept the old style US $100.00 any more.