Postal service workers typically do the following:

• Collect letters and parcels
• Sort incoming letters and parcels
• Sell stamps and other postal products
• Get customer signatures for registered, certified, and insured mail
• Operate various types of postal equipment
• Distribute incoming mail from postal trucks

Postal service workers receive and process mail for delivery to homes, businesses, and post office boxes. Workers are classified based on the type of work they perform.

The following are examples of types of Postal Service workers:

Postal service mail carriers deliver mail to homes and businesses in cities, towns, and rural areas. Most travel established routes, delivering and collecting mail. Carriers cover their routes by foot, vehicle, or a combination of both. Some mail carriers collect money for postage due. Others, particularly in rural areas, sell postal products, such as stamps and money orders. All carriers must be able to answer customers' questions about postal regulations and services and, upon request, provide change-of-address cards and other postal forms. 

Postal service clerks sell stamps, money orders, postal stationery, mailing envelopes, and boxes in post offices throughout the country. These workers register, certify, and insure mail, calculate and collect postage, and answer questions about other postal matters. They also may help sort mail.

Postal service mail sorters, processors, and processing machine operators prepare incoming and outgoing mail for distribution at post offices and mail processing centers. They load and unload postal trucks and move mail around processing centers. They also operate and adjust mail processing and sorting machinery.