Check who should receive the message
Confirm that you have the right person, the right role, and permission to disclose the information involved. For a message about how to stop family criticism of your parenting, use this factual base: identify the visit, topic, money, photo, event, care task, or comment that needs a limit.
Separate information from interpretation
Label confirmed facts, open questions, and the specific decision that belongs to the recipient. State what is allowed, what is not, and how you will respond consistently. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Use formal help when stakes rise
Do not threaten access to children or elders as punishment, and do not debate the entire family history. Use safeguarding, legal, domestic abuse, or emergency support where safety, custody, or coercive control is involved. Medical, legal, financial, employment, and safety decisions may require a qualified professional rather than personal persuasion.