Protect a document so it can't be overwritten

[pumkinbug87]

I create documents that are saved to the server for all employees to use (memo templates, timesheets, request forms, ect.).
However the people I work with continuously save their information on the master copy.

Is there a way to save/protect the master copy, so people can make changes - any changes they want - but when they save - they MUST "save as" and a new file name?

Using Microsoft Office 2010 - saving as 97-2003 Compatible

Thanks for ya'lls help!
Pumkin