Short answer
An NDR is the courier's notice that a delivery attempt failed — customer unavailable, address issue, or refused. Some NDRs become successful reattempts; others become RTO.
Formula
NDR-to-RTO = RTO after NDR / NDR shipments
Worked example
If 200 shipments get an NDR and 80 of those return to origin, NDR-to-RTO is 40%. Calling or WhatsApp-ing the customer in the first hours after NDR often saves the order.
This term sits in the D2C operations hub. Use the related pages below for the full playbook.
Frequently asked questions
What does NDR mean for a D2C brand?
An NDR is the courier's notice that a delivery attempt failed — customer unavailable, address issue, or refused. Some NDRs become successful reattempts; others become RTO.
Where should I track NDR?
Start in the D2C operations guide and the linked calculators or product pages. MarQet BI is built around this operating problem.