Clarify the agreement that existed
Identify the promise, policy, schedule, ownership, or shared understanding that applies before assigning blame. For a message about how to give a roommate notice that you are moving, use this factual base: record the property, room, payment, repair, behavior, and relevant lease or household agreement.
Resolve the next dependency
State what is complete, what remains disputed, and which action would move the situation forward. 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.
Document without threatening
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. Keep a factual record and describe only remedies you are entitled and prepared to use.