As account or group administrator, how do I delete document out for signature that were created by a terminated employee

As account or group administrator, how do I delete document out for signature that were created by a terminated employee?

We are starting to use EchoSign for contract approvals in our sales group.

If a salesperson  resigns or is terminated, how does and account or group admin manage the documents that are in process by the former employee?

Regards,

Brad