The AuditTrail and eSignature packages

The AuditTrail package
Use the AuditTrail package to specify which records are to be audited when they are created or changed. When you enable a record type for audit trailing, all changes to records of that type are audited. You can also disable audit trails for any record type for which they have been enabled.

The eSignature package
Use the eSignature package to require users to add their electronic signatures to records under the circumstances that you specify.

Customizing the packages