The area of photography that interests me the most is taking people's portraits and headshots. I'm just starting out but eventually I want to create my own website with examples of my work. Is there one model release form that anyone can recommend covers me for all uses and for allowing me to publish an image to the most popular websites such as Getty Images, Shutterstock, etc or do I need their version of the release form? Also how important is the witness section on the form? Most of the time I'm expecting to meet the subject on location and since I don't have a studio just do outdoor shots, so there might not be anyone else around to witness the signatures.