My second-hand Canon camera tagged all my photos with the name of the previous owner. The author name cannot be changed in the camera settings – the camera has to be connected with a mini USB cable to a computer that runs the Canon EOS Utility. I am sure that I have at least one mini USB cable somewhere in my apartment, but I couldn’t find it, so before I surrendered and ordered a new one, I had used this command to remove author info from my photos: