This has happened to me too. I visited an ATM in Abuja at Kubwa branch of GTB with my Zenith bank card but on checking my balance it was given to me in $ dollars like my brother had said. I couldn't understand what happened I thought it was that particular ATM may be it dispenses $dollars but trying other their other ATMs it was the same. I ended up not withdrawing that day in case something will go wrong and I will loose my money. bamidele