This message is from Target (this could include Target.com, Target.com Direct Vendor Ship and Target Canada) and informs you that an Advance Ship Notice has not yet been received by Target for an open Purchase Order in their system. You should see these start to arrive once a day starting the day before the due date for the Ship Notice. If you receive this error and have not yet sent an Advance Ship Notice, you should do so as soon as you can. If you think you have already sent a Ship Notice for the orders listed in the message, you should first make sure that you didn't just save it to your Drafts folder in WebForms instead of sending it. You can check whether you sent or saved a Ship Notice from a certain Purchase Order by clicking Next Steps on the order and then selecting Related Documents from the Next Steps menu.