When the order is out for delivery for the first time and is not delivered to the customer for any of the reasons below, it is marked as undelivered 1st attempt. In such cases, the customer receives a mail with the re-attempt link in which they must take action by selecting the date for re-attempt. If the customer fails to take any action, you can request for a re-attempt and more through the NDR page on the Merchant Panel.
Reasons for undelivered shipment
Customer not contactable
Incomplete address
COD amount not ready
Future delivery requested by the customer
Self-pickup requested by the customer
Customer refused delivery
Door/premises/office closed
Note - No. of attempts made by different courier companies vary. Few make 3 attempts before the order is marked RTO and few are marked RTO after the 1st attempt.