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 congratulate someone on an engagement, use this factual base: name the milestone and, when you know it, the effort or meaning behind it.
Resolve the next dependency
State what is complete, what remains disputed, and which action would move the situation forward. Offer warm recognition and let the recipient decide whether they want a call, visit, gift, or quiet celebration. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Document without threatening
Do not make assumptions about pregnancy, money, relationships, health, or what the achievement should mean next. Follow the person's lead on privacy before sharing their news or photos with anyone else. Keep a factual record and describe only remedies you are entitled and prepared to use.