Mail carriers deliver mail to homes and businesses along an established route.

At the post office, mail carriers sort mail in the order it will be delivered and put it together in bundles. They deliver the mail along their route on foot, by vehicle, or a combination of both.

Carriers pick up outgoing mail. They fill out delivery forms, collect charges, and obtain signatures on certain types of mail. They use handheld scanners to scan labels to confirm receipt of letters and packages. They also give out change of address cards and other forms, and answer questions about mail services. They may hold mail for customers.

Rural carriers may sell stamps and money orders. They also may register, certify, and insure parcels and letters. They return all money and receipts back to post offices.