Some copyright owners want to allow their work to be used by others. Many do this with the use of a Creative Commons licence.
A Creative Commons license allows people to use someone elses copyright work under certain conditions.
These conditions can include
If the Creative Commons licence is breached then the normal consequences of copyright law applies. Under a Creative Commons licence the owner would not need to be contacted unless their work was going to be used in a way not described by the conditions of the licence.