Which form would be used to report a disqualified mailing?

The use of PS Form 8075 is specifically designated for reporting disqualified mailings. This form provides the necessary details about the mailpiece and the reasons for its disqualification, ensuring that the postal service can accurately analyze and address any issues related to the mailing standards. This is critical in maintaining the integrity of mailing practices and ensuring compliance with postal regulations.

Other forms mentioned serve different purposes: PS Form 3600 is typically utilized for reporting postage statements for bulk mailings, PS Form 6116 is used for reporting postage due when mail is presented without adequate payment, and PS Form 9016 deals with certain types of mail service agreements. Understanding the specific uses of these forms helps avoid confusion and ensures that mailings are handled appropriately according to postal guidelines.