What is required for First-Class Mail before it can be accepted?

For First-Class Mail to be accepted for delivery, it must have the correct postage affixed to the mail piece. This requirement ensures that the sender has paid for the postal service provided. Adequate postage reflects the weight and size of the item being mailed, and different rates apply depending on these factors. If the postage is insufficient or incorrect, the mail piece cannot be accepted.

Other options, while relevant to different services or mail types, do not apply specifically to First-Class Mail. Insurance documentation is necessary for packages that are insured but is not a requirement for standard First-Class Mail. Signature confirmation is a service option used primarily for certain tracked deliveries and is not needed for all First-Class Mail. Lastly, specific tape for sealing is not a standard requirement; acceptable sealing methods may vary, but there are no exclusive tape mandates. Thus, correct postage affixed is the sole fundamental prerequisite for acceptance of First-Class Mail.