Are any of the participants in your workflow set up to be out of office with delegates? I think that could cause a task to be forwarded like this.

If you have access to the K2 Management site, you can also navigate to K2 Management site > Users > Out of Office, and it should show who has configured out of office and who they are redirecting their tasks to.

Hi @abentsui 
Have you resolved your question? 

@abentsui ,

This emails come if someone has delegated or redirected any task to you or if anyone has set Out of office into K2 Management and set u as task to forward. 

Thanks,
Arvind