The United States Postal Service typically does not conduct formal job interviews. Instead, applicants are evaluated based on online assessments, background checks, and meeting job eligibility and qualification requirements. You only need to apply.

I wouldn't call it an interview. They basically call you once they've decided on you. Then tell you what the job title is, explain the position, and the hours you can expect to work. And then they ask if you are ok with that and want to proceed before they set up your in person interview, which is the same thing except in person. Then they will fingerprint you. Once all that gets processed along with your background you will get an email to let you know when and where your training is.