Missing info about deleted candidates / applications.

We have an API / XML integration to join for candidates which we have not already sent a rejection out of join.
When a candidate synced into our system deletes his/her application on join, we get informed by Join that there was a deletion, but not which candidate it is. Can you please let us know in each case which candidate has deleted their application so that we can delete this candidate and his/her information from our system as well.