There are various ways in which one may initiate a career in call centers, the most common of which is to apply directly to a call center's recruitment office. This process is commonly coined as a "walk-in" application. Another procedure includes an employee referral, where an applicant is referred by an existing employee of a call center. A person may also apply through an employment agency, which will conduct its own screening procedures, before endorsing an applicant to any call center.