Car light soaked or whatever submerged

Hi, somehow my car bill has bent. Has someone experience how easy it is to get a new one. My registration office means affidavit, letter, TÜV report, (has probably dilute itself with bill) and so on. Do I need, if I can not find the TÜV report, a new TÜV? Are there simpler ways???? Nice time and good ride. Wolf24