My brother works as a Bank teller,seems to me as they work behind the counter
well a teller is an employee of a bank who deals directly with customers.
When did the usage come into existence?
well sometimes they are known as  this employee is known as a cashier or customer representative
That's good! So I believe we are discussion is banking. So when was the first ever banking system establish?
Bank teller
A bank teller (often abbreviated to simply teller) is an employee of a bank who deals directly with customers. In some places, this employee is known as a cashier or customer representative. Most teller jobs require experience with handling cash and a high school diploma. Most banks provide on-the-job training.
Tellers are considered a "front line" in the banking business because they are typically the first people a customer sees at the bank.
Responsibilities and Duties of the Bank Teller.
provides facilities for debit card, internet banking and mobile valet to customers, as well as real time money transfer and online warehousing. In India, the banking sector is still lagging behind the developed world, so to reach unbanked people in Buldana Urban, it has started a mobile banking van.
The society has a tie up with Yes Bank for a doorstep service, called Nano Teller, through which the society's employee provide customers to deposit or withdraw up to from their savings account. In 2012, the service was