Freeze the approved content
Do not begin final output while facts are still moving. Confirm front visual and headline, short supporting message, recipient or address area, sender identity and response details and any conditions and record the approved revision. Mail dates, promotional codes, contact details and address conventions should be checked before personalisation or bulk production.. Run spelling, design and accessibility reviews, then save the editable .mpub before creating a PDF. A later correction needs a new proof; editing after approval without repeating review breaks the audit trail.