Make room for the other version
Ask what the other person understood before assuming that you are arguing about the same facts. For a message about how to request overdue assets from a client, use this factual base: identify the brief, deliverable, rights, fee, revision history, and contract term that applies.
Correct the record precisely
Correct only what you can support, acknowledge any real impact, and propose a practical way to prevent repetition. State what you can deliver next, what approval or payment is required, and when the offer expires. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Agree on a testable next step
Do not release rights or final files beyond the agreement, and do not shame a client publicly. Use platform support, legal advice, or a formal takedown process for fraud, infringement, threats, or identity misuse. Do not recruit an audience, publish private evidence, or turn a misunderstanding into a campaign about character.