Which form is associated with First-Class mail postage statements?

The form associated with First-Class mail postage statements is PS Form 3600 FCM. This form is designed specifically for reporting the total volume and postage of First-Class mail that is being sent. It provides postal facilities with the necessary information to process and track First-Class mail accurately.

Using PS Form 3600 FCM is essential for businesses and organizations that regularly send First-Class mail, as it ensures compliance with postal regulations and helps in maintaining accurate records of mailing activities. The form includes details such as the number of pieces mailed, the weight of the mail, and the total postage paid, making it a vital document for both accounting and postal auditing purposes.

The other forms listed do not pertain directly to First-Class mail postage statements. Each of them serves different purposes within the mailing system, which is why they are not the correct choice in this context.