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Which form of mail requires proof of delivery?

  1. Express mail

  2. Standard mail

  3. Parcel post

  4. Media mail

The correct answer is: Express mail

The requirement for proof of delivery is a critical factor for certain types of mail, and Express Mail is designed specifically to provide this level of assurance. Express Mail, often known as Priority Mail Express, includes tracking and guarantees delivery by a specific time. This service caters to urgent shipping needs and ensures that senders have confirmation that their item has been delivered, making it ideal for important documents or high-value items. In contrast, other options such as Standard Mail, Parcel Post, and Media Mail do not typically offer the same level of tracking and proof of delivery. Standard Mail is mainly used for bulk mailing and does not guarantee delivery times, while Parcel Post focuses on cost-effective shipping without the same focus on delivery assurance. Media Mail is designed for specific types of educational materials and also lacks the proof of delivery feature that is integral to Express Mail. Thus, the need for tracking and verification of delivery makes Express Mail the correct choice for this question.