Card skimming is rife in Guatemala City – try to use ATMs that are under some sort of watch at all times, such as those inside stores or shopping malls.
American Express In an office of Clark Tours.
Banco Agromercantil Changes US dollars (cash, not traveler's checks).
Banrural Currency-exchange services. On the airport departures level.
Visa/MasterCard ATM, Zona 1 Inside the Paiz Supermarket.
Visa/MasterCard ATMs, Zona 10 Inside Los Próceres mall.