ARGH - so yesterday, parked in a hospital car park while my wife was having an operation - some low life scrapes the bumper on our 3 series - really screws it up. No sign of a note, and I don't think CCTV will catch it either. ARGH It'll be a full repray job for the bumper - at least other damage from people backing into it can be sorted now.
Mason - I'm not sure how bad yours is, but as I mentioned above, a proper bodyshop may be able to fix without painting what a quick repair guy can't. I had 3 quick repair guys look at my Z4 and they all said that a fix wasn't possible without painting etc. The BMW bodyshop sorted it without resorting to that - they simply had to remove the door to get better access to the area for better leverage.