Name the impact without exaggerating it
Describe who had to wait, worry, redo work, spend money, or make a choice with incomplete information. For a message about how to tell someone to stop contacting your child, use this factual base: identify the content, account, place, person, channel, access, or behavior that must stop.
Make repair practical
Offer the repair you can actually complete, with ownership, timing, and any limit stated honestly. Give the required action, any lawful deadline, and the one permitted route for necessary matters. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Let future behavior carry the proof
Do not debate the boundary repeatedly or threaten consequences you are not entitled to use. Save evidence, secure accounts, reduce access, and contact platform, workplace, legal, or emergency support when risk continues. A promise inside a message is weaker than a visible change in what you do after it.