How to remove educational stamp from AutoCAD drawings?

To my knowledge it will appear as long as you using a student/teachers license ....

I never had the problem, but than I never used my AutoCad other than for educational purposes, since it is not legal to use the student/teacher version for commercial purposes...   

I found this reference written by chaitanya.sundar 

http://www.cadeverything.com/help/showthread.php/4654-removing-of-plot-stamp-from-a-drawing

1.Open the affected drawing 

2.Type "dxfout" in the command prompt 

3.Save the dxf in the location you can easily access 

4.Now, type "dxfin" in the command prompt 

5.Browse the file you save in step3 

6.Save the file as dwg The Produced by an Autodesk Educational Product should be removed upon completion of the steps above. If the educational product plot stamp still appears, check the xref file and apply the steps I’ve mentioned above.

save as a DXF file but in a far more earlier versión, then insert the DXF in a clean Drawing, This Works for a lot of different  problems

The Simplest way is to buy the licence for the Software,

The stamp only appears when you are using the free version.

I agree with Other Specialties. 

                                Convert your .dwg file into .dxf file to avoid educational stamp in save as dialogue select any dxf format and version  

This should be removed by highlighting the text and deleting  

try to save the dwg file as dxf file

It usually depends upon the license version you are using and DWG files created using student license have educational stamps, to remove these steps you can follow this trick

• Start AutoCAD and open the DWG file
• Now in command prompt type 'dxfout' and save it 
• Again go to CMD and type 'dxfin'
• and open the file, the DWG file will open in DXF format but without the stamp. 
• Save the DXF file in DWG format and the stamp will be removed.

This method will workout for selected AutoCAD version. You can try the AutoCAD File Recovery software. This tool allows you to edit the DWG file and customize it according to your style. It makes the DWG to DXF conversion easy which helps in removing the educational stamp from DWG file. 

Type in command prompted dxfout>save file in desktop> sadxfin > select file from the desktop>then save file as normal drawing file> try to preview the print out again > educational plot stamp is now removed.

AutoCAD (and newer) has been designed to remove the plot stamp altogether when a drawing is saved. Once a file is saved in, it can be sent to users on earlier versions and the plot stamp will no longer be a part of the file. The DWGCONVERT command can be used to batch process resaving multiple files