Final answer:
A Certificate of Mailing does not require a signature at the time of delivery, while Certified Mail does.
Step-by-step explanation:
A Certificate of Mailings does not require a signature at the time of delivery. It is a service offered by the United States Postal Service (USPS) to provide proof that mail has been sent. It is used when you want to prove that you have sent something, but you do not need proof of delivery like you do with Certified Mail. It is often used for bulk mailings or for legal documents that need to be recorded with the court system.
On the other hand, Certified Mail provides a mailing receipt and requires a signature at the time of delivery. It is used when you want to have proof of delivery and a record that the item was received. It offers a higher level of security compared to Certificate of Mailing.