Go to Workflows > Data flow. You can also access it from Admin console > Workflows > Data flows

• Create a new data flow with following source and destination

1. Source: CSV Upload

2. Destination: Delete contact

   
   

Once created, you will need to add the following in JSONATA expression if your key identifier is phonenumber:

{
 "identifierKey": "phonenumber",
 "identifierValue": "+" & $.Phone
}

If your key identifier is emailaddress:

{
 "identifierKey": "emailaddress",
 "identifierValue": $.Email
}

If you want to delete contacts irrespective of the identifier you can use below format. In this case, ID is the name of the column of csv file you upload.

{
 "contactId": $.ID
}