Hi. Please. 
I have a question to ask about my duldung position.  I'm working with Duldung since  6 months.  Within 3 months  the send me a FORM that I should fill it. And give them the reason why I don't want to go back to my country.  Which I did.  After 3 months again. They send me The same FORM that I should fill it and also tell them the reason why I don't want to go back to my country.. But what is confusing me now is that.  MY AUSWEIS  WILL BE EXPIRE ON THE 6th OF JUNE.  AND THEY SEND ME A POST AND A FORM  WHICH THE WANT ME  TO FILL. In other to give them the  reason  why I don't want  to  go  back  to  my country That I should come on the 18th of June in other to renew my AUSWEIS duldung. But I don't know the reason why.  And I'm working. 
Now. I WILL STAY WITH NON VALID AUSWEIS duldung  FOR 12 DAYS.  ????
OR. Is it because the told me  that I should go and bring my  PASSPORT. I DON'T UNDERSTAND