Hello @KelvinP5 ,
Deleting a contact from your account just removes them as a contact that you can send to, or that would apply to later subscription renewals. You won't be able to view those individual contact records since they're deleted, but if you re-upload them their engagement notes would be restored for viewability. The email campaigns they were already sent will still retain their reporting data, deleted contacts would just show with strikethroughs in their data set.
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