wpcrm_system_gdpr_delete_request_attachments
The wpcrm_system_gdpr_delete_request_attachments filter returns the attachments that are sent with the GDPR delete request email. GDPR requires that an individual can request to have their data deleted, and this email will provide you with notice of the request.
By default no attachments are sent with the email, but can be done so by modifying the output of this filter.