Before checkout
Show the qualifying purchase, relevant dates, important exclusions, and a direct path to terms. Place details close enough to the promotion that a customer does not need to search for the real conditions.
After the order
Acknowledge the campaign, distinguish receipt from qualification, explain timing, and provide recognizable sender details. Status changes should be consistent with support records.
When something changes
Prepare messages for order edits, cancellations, returns, failed delivery, duplicate inquiries, and not-qualified outcomes. Give each message an explanation and a safe next step.