# Checking a File

This topic describes how to verify that a DocuWorks file or binder is not corrupt. You can perform this procedure before or after sending a DocuWorks document via e-mail, before or after transferring it, or after downloading it from a web page to confirm that it is not corrupt.
If a check on a protected document results in an error, the document may have been tampered. You cannot save (or save as) such document.
Note
File checks are performed on DocuWorks files that have not been updated since the previous save. It is recommended that you run a file check on a DocuWorks file immediately after you open it.
Procedure
1.
Select a DocuWorks file to check, then select [File Check] from the [Document] menu.
If the check succeeded, the "File check ended with no problem." message appears. If there is an error, the message "File is damaged during file transfer or due to faulty disk." appears and the problematic area is displayed.