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# Lock periods

By using this feature you can make sure that **work orders, incoming invoices and internal supply orders** are **locked automatically** once a period has been closed. 

### Use

Documents that fall within a given period will be locked automatically. Once a document has been locked, you cannot roll this back manually. You can only undo the lock by rolling back the lock period. 

|| Adding a document to a lock period or removing it from one is recorded in the audit log of that document. 

### Settings

Users with access to the settings can manage lock periods. You create them through the 'projects' module. You do this by clicking the **Lock periods** action button at the top. 

![Action button 'lock periods'](https://storage.crisp.chat/users/helpdesk/website/eadf6dec760ec000/schermafbeelding-2024-10-16-om_hqdzfy.png)

In the overview you see the various periods that have already been created. Every period contains a FROM DATE, TO DATE and COMPANY. 
A new period always starts **from the previous period**.
A period can be set **per company.** If you work with only 1 company, the 'company' column is not visible. 

![Creating lock periods](https://storage.crisp.chat/users/helpdesk/website/eadf6dec760ec000/schermafbeelding-2024-10-16-om_1nsjzeh.png)
||| Once a period has been created, no new documents can be created within the period given. They automatically get the first following date that falls outside the period.