A legit staffing agency asks you for your contact details, updated resume, references, and salary expectations. They don't request unnecessary personal information or ask you to transfer money before you start the recruitment process.    Other signals indicate if the staffing agency is legit. For example, they send professional emails (not emails from free accounts or with punctuation mistakes), they answer your questions about the role and the tasks you will perform, and they serve a formal interview. The best staffing agencies scan all the applicants to present the best talent to their clients. Therefore, you should expect a legit agency will interview you.