PND paperwork

When we give a PND on the street for a recordable offence, it requires a crime report but no case file.

A PND in custody usually needs a case file with an ERO recommending a PND

In the, albeit rare, circumstance where a PND can be given out of custody for a non recordable offence such as Drunk and Disorderly- would a case or crime report be required, or neither?