In early days Gold was considered the standard currency for exchange between the people of various nations. Gold used to act as a standard and everything was seen with respect to it. Over the years and with the emergence of US as a global power, both politically and economically, the US dollar has gained unprecedented importance in world trade. Though officially gold is still a standard, the US dollar is now accepted almost all over the world as a standard. For people who are in the business of where trade is across borders, the US dollar is the global standard. All freelancers and Web Developers and even exporters and importers who operate from various countries over the internet also need to keep a standard as far as the currency is considered and US dollar is the apt currency. A bank account with a US bank thus gains a lot of importance.

The US banking structure broadly classifies its customers into three categories:

1. The US citizens
2. Resident Aliens
3. Non Resident Aliens

As the names suggest the meanings of each of them is implied. The resident aliens are the non-US people who are residing in the US. These also sometimes include the people who have the Green Card. Non Resident Aliens, as the name suggests, are people who are neither citizens of the U.S nor are they residing in the U.S. The rules and regulations that govern the banking systems in US make it very difficult for the NRA