Any good painter or artist is very much in demand. His paintings are found on the internet, magazines, periodicals, school books, newspapers, souvenirs, etc.
Before his paintings are reproduced he has to sign an artwork release form to allow their publication. He agrees to do so in lieu of a monetary compensation and thus specifies the way in which that artwork can be used.
He still holds copyright over his work and any other party desiring to use it will have to get his permission.
You can Download the Artwork Release Form post; customize it according to your needs and Print. Artwork Release Form is either in MS Word and Editable PDF.