Where's George is a legitimate currency tracking project that has been tracking dollar bills since 1998, as reported by NPR. Scholars have used statistics generated by the project to map the flow of currency, model infectious diseases and test network theories.
Hank Eskin established WheresGeorge.com in 1998 as a way of tracking his $1 bills. Since then, the website has grown to track more than 250,000 dollar bills, as of 2015. People who wish to track their bills log in to WheresGeorge.com and enter their ZIP codes and the bills' serial numbers before spending their money. If another person later enters the same serial number on the website, the first user receives an email notification informing them of the bill's new location.
The currency tracking project attracts a pool of fanatics who label their dollar bills before spending them. Dollar tracking hobbyists stamp their bills with messages asking future recipients of the bills to track them at WheresGeorge.com. People who receive dollar bills with these stamps can visit the site to see the location of the previous owners of the bills. Although the website has faced some controversy in the past, issues regarding the legitimacy of the tracking project have not yet emerged.