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 thank a customer for useful feedback, use this factual base: name what the person did, when it mattered, and the practical or emotional difference it made.
Resolve the next dependency
State what is complete, what remains disputed, and which action would move the situation forward. Thank them directly and share one honest outcome they helped make possible. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Document without threatening
Do not exaggerate, create a public spotlight without consent, or attach a new favor to the same message. Protect private health, financial, workplace, and family information when describing their help. Keep a factual record and describe only remedies you are entitled and prepared to use.