Mailers and the Postal Service have shared access to reports on Seamless Acceptance mail quality. Seamless Acceptance Mail Quality reports can be found by drilling down on the Mailer Scorecard. Reports are updated every day with verification results as mail is sampled and processed. Reports provide both a high-level overview of mail preparation quality for the month and allow the mailer to drill into detailed error information.
Detailed guidance on reporting functionality and user guides is available in the Guide to Streamlined Mail Acceptance for Letters and Flats Reporting, found here: https://postalpro.usps.com/MailAcceptanceReportingGuide.