Platinum Member located in the UK
Join Date: Nov 2012
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Re: Touched a bumper.
If there is no damage there is no need to report it or leave details.
Thats what bumpers are designed for .... to absorb minor / low speed impacts.
However having said that the cost of repair to cracked plastics or paintwork can be costly. Also in theory you could also bend the metal panel / mounting point behind the bumper without leaving any visible mark outside .. although in your case I think it very unlikely if it was just a 'touch'.
It is annoying if you see another driver bump into your own car, but you did the right thing by waiting around but no one appeared, so you can sleep with a clear conscience.
Currently in Renoir White's garage:
Renault Trafic 1.7 Petrol Vauxhall Astra 1.4i & in bits Triumph Bonneville T140E & H-D XLH1200