When a contract has been created, edited, verified, or changed, the history is always saved. The date, time, and name of the person who processed the contract are saved and it is also possible to add comments on the changes.
Edits are noted as "Updated" and verifications are noted as "Verified".
You start by entering into Contracts and open the contract.
Then you click on the tab "Show comments". Here you see a compiled view of what changes have been made, at what date and time, and lastly by whom.