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 a tenant about a rent increase, use this factual base: record the property, room, payment, repair, behavior, and relevant lease or household agreement.
Make repair practical
Offer the repair you can actually complete, with ownership, timing, and any limit stated honestly. Ask for one remedy with reasonable access and timing, then document what was agreed. 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 enter private space, withhold essential services, threaten eviction, or change locks without lawful authority. Use emergency, housing, tenant, health, or legal support for unsafe conditions, violence, or unlawful conduct. A promise inside a message is weaker than a visible change in what you do after it.