The Token [[PURGE_DATE]] is not listed as a supported token in Recruiting Emails Templates or for the Recruiting Email Trigger "Imminent Candidate Purge Notification"
SAP SuccessFactors Recruiting Management
The Token [[PURGE_DATE]] is only available in Email Notification Template Settings and is not currently supported in "Recruiting Email Triggers" for the Email Trigger "Imminent Candidate Purge Notification".
If you feel that this feature should be added to the product roadmap feel free to vote for this exiting enhancement request 266815.
2749954 - How to Notify the Candidate When His Application or Profile Will be Purged - Recruiting Management
[[PURGE_DATE]], Recruiting Email Triggers, Candidate Purge Notification, Purge, Purge Email , KBA , LOD-SF-RCM-EML , Recruiting Emails and Notifications , Problem