Hello Mariya Tsvetkova,<br> <br> yes, you should be able to do that using the Platform API with the webservice activity.<br> This is the route you need to use: <br> <code>POST https://{{DocuWareServer}}/docuware/Platform/FileCabinets/{{FileCabinet-GUID}}/Documents/{{Doc-ID}}/Annotation</code><br> <br> Position is optional - if you give no position information, the API places the stamp in a convenient position, just like a normal workflow task stamp.<br> If you want to include the position, remember that the API expects twips as the unit of measurement.<br> <br> Hope this helps.<br> Greetings from Germany,<br> Simon H. Hellmann<br> DocuWare System Consultant