Banking in Tahiti is not a problem. The bank near Motu Moie is across the lagoon in Patio, Tahaa is Banque Socredo. International Tahiti Financial Services are available a bit farther in Uturoa, Raiatea and Papeete at Banque de Polynesie and Banque de Tahiti.
Tahiti currency is the XPF or French Pacific Franc. The exchange rate varies with the value of the Euro, 100 XPF is approximately equal to 1 USD and 119 XPF is approximately equal to 1 Euro.