You have to de-register from the city of Augsburg only when you leave Germany, or in case you want to cancel a second apartement (Nebenwohnung).

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For notice of departure you will need:

• your passport
• residence permit (+ green "Zusatzblatt") or Fiktionsbescheinigung
• Abmeldeformular? fill-in help

Please send an e-mail with a scan of the documents needed to aufenthalt.uni@augsburg.de