Identify the people who need a reminder
A booker may have completed their own form while other participants remain outstanding. Confirm whether your records distinguish them and who is allowed to receive each link. Avoid treating one signed form as completion for an entire group.
Choose a useful timeline
Send the initial request when the guest can understand the activity and complete the task. Schedule follow-up relative to the departure, allowing time for questions. A booking made months ahead and one made the same morning need different timing rules.
Stop when the reason disappears
Check completion before each send. Account for cancellation, rescheduling and a changed participant list. Use a maximum reminder count and hand unresolved cases to the arrival team. Repeated messages after signing undermine trust in the process.
Test the full path
Complete the form from the actual message link and inspect the staff view. Verify booking association, status updates and any on-site stage still required. Review how the message renders on a phone and whether a guest can get help without searching for another contact route.
A concrete example
A group has four expected participants and three complete forms. The next reminder should target the unresolved participant journey, with a clear on-site route if it remains incomplete.
Put it to work this week
Check who receives the request, what stops it and what staff see when the departure approaches.