Hi @mohiniu12161390 ,
The delivery details stored in RecipientDeliveryLog table. When you are creating your query, you can select RecipientDeliveryLog as filtering dimension with Recipient and targeting dimension, as shown below
![InMo_0-1593085306543.png InMo_0-1593085306543.png](https://experienceleaguecommunities.adobe.com/t5/image/serverpage/image-id/24992i40FBEEB12FD8D678/image-size/medium/is-moderation-mode/true?v=v2&px=400)
Add below criteria to select targeting recipients who had already received a particular delivery
![InMo_1-1593085324340.png InMo_1-1593085324340.png](https://experienceleaguecommunities.adobe.com/t5/image/serverpage/image-id/24993iE2C276CC460A8B4C/image-size/medium/is-moderation-mode/true?v=v2&px=400)
Now you can exclude above population from your eligible targeting population.
Also inside delivery you have a option to exclude duplicate recipients.
Open delivery > Click on To > Exclusions tab > Edit > tick check box
see below screen print (marked in yellow)
![InMo_0-1593137395345.png InMo_0-1593137395345.png](https://experienceleaguecommunities.adobe.com/t5/image/serverpage/image-id/25018iBC2A3EA7A1B08885/image-size/medium/is-moderation-mode/true?v=v2&px=400)
Hope it helps
Regards