I have been accused of copying someone but it is just a coincidence. Does this make a difference?

In order to prove a case for unregistered rights infringement there has to be proof of copying.  Similarities by themselves may not be enough.  If you are creating your own Designs you need to keep evidence of how you did it.  Story boards, sketches, sources of inspiration all to show how you went from the concept to the final article without copying someone else’s work. Make sure this evidence is in the ACID IP Databank too.