Due to lack of Signature Required ability due to Covid-19, our temperature sensitive orders are shipped with "Card for Pick-up". What we have discovered is that a significant portion of these shipments are reporting that they never received a card for pick-up. We have adopted the practice of going through the shipments, tracking them, and contacting customers whose status has updated to "notice left", "shipment ready for pick-up", to notify them that there should have been a card delivered and that their package is now ready for pick-up. This has greatly improved a bad situation, but because we can't flag/mark shipments in Shipments, we can't easily keep track of who we have already contacted, who we haven't already contacted, and this leads to missed opportunity and excessive labour.

I recommend, under column "Notifications", beside "Marketplace Notification", "Shipment Email", and "Delivery Email" icons, you add a "Flag" icon which can be toggled on or off by the user. Afterwards, the ability to sort shipments by "Flag Status" would be exceptional.
Thank you for the consideration.
Adam