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 invite family to a baby shower after distance, use this factual base: give the event, date, location, relevant history, and what kind of contact the invitation involves.
Make repair practical
Offer the repair you can actually complete, with ownership, timing, and any limit stated honestly. Offer a simple way to accept, decline, ask a practical question, or choose a lower-contact option. 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 announce their attendance, use relatives to persuade them, or make a public gesture before they agree. Respect no-contact, venue safety, custody, and legal restrictions even when the event feels important. A promise inside a message is weaker than a visible change in what you do after it.