In the cancellation of PCN document, under point 6 of the compelling reasons/mitigating circumstances, it says the following:
The motorist had a valid permit or other required item for the place where the vehicle was parked but the item was not displayed at all or was displayed incorrectly
When in a place that requires a permit, scratchcard, pay & display ticket, Disabled Person's Badge or any other item to be displayed in the vehicle, that item must be displayed so that all details are clearly visible. If a CEO cannot see all the details then a PCN may be issued. It is not a defence against a PCN simply to possess an item. If the item can be produced with the representations, however, and was valid at the time of the contravention then the Council will consider using its discretion to cancel the PCN. In general, discretion will only be applied once.
This policy does not apply to multi-vehicle permits or Disabled Person's Badges if they are not visible in the vehicle as they could be in use elsewhere.
The last sentence seems to me that it is relevant to my situation?