Own van, local courier, hand delivery: Shopify never learns those parcels arrived, so orders sit in transit. One email from your store asks the customer whether the order arrived. Yes marks the order delivered in Shopify. Not yet puts the order on your Overdue list with the customer's note. Your store's usual Delivered email goes out on a Yes. Parcels with a tracked carrier are asked about only if they still show as not delivered by your deadline.

• The email is your store's own Shipping update, with your logo and sender
• Set up once: paste three snippets; nothing is sent before you tap your own test
• The customer's Yes marks it delivered; Not yet lands on your Overdue list
• Per shipping method: switch the question off, or change the days to wait
• Orders and fulfilments only, no customer fields; deleted 30 days after uninstall