This template also covers Artists with Agents if applicable. You will need to create a free Submittable account to submit to these forms.How to fill out the Custom Art Commission Contract Agreement? An art purchase agreement is a contract between an art seller and a buyer that determines the conditions of a sale of a piece of artwork. Use this template as a guide to write your own artist contract or simply fill in the blanks to easily craft your legal agreement. Artist Biography: Robert Ortbal is an Art Professor in the sculpture department at. Sacramento State University. Upcoming events, symposiums, workshops, trainings, mcles, and legal news in our offices across the state. Artist, and some citizens get free art.