Express mail is a fast postal service that guarantees quicker delivery of mail and packages compared to regular mail. It is typically used when urgent or time-sensitive items need to be sent. Express mail services offer tracking and often include a delivery guarantee, meaning the item will be delivered within a specific time frame, such as overnight or within a few days. This service is commonly used for documents, parcels, or packages that need to arrive quickly, and it often costs more than standard mailing options due to its speed.

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