delivery confirmation deˌlivery confirˈmation noun [countable]
a service provided by the post office where the person who receives a letter or package signs a document to prove to the sender that they have received it; = advice of delivery Bre
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delivery confirmation UK US noun [C or U] US
► COMMUNICATIONS in the US, a service provided when you send a letter or parcel, in which the person receiving it must sign a document showing that it has arrived: »
Consider using priority mail with delivery confirmation if you want to confirm that your parcel was delivered.
Financial and business terms. 2012.