Here is a sample basic image release form for a person under age for photography that includes image use for social media, website, print and stock photography:
IMAGE RELEASE FORM FOR MINORS
I, [parent/guardian name], the parent or legal guardian of [minor name], hereby grant permission to [photographer name] to photograph [minor name] and use the photographs taken in connection with his/her professional photography business, including without limitation for display, advertising, and/or promotion on social media, website, print and stock photography.
I acknowledge that I have no right to any compensation for such use of the photographs taken and that all rights to the photographs, including copyright, shall be owned by [photographer name].
I represent that I am the parent or legal guardian of [minor name], and I have the authority to grant permission for the use of the photographs taken by [photographer name].
I hereby release and discharge [photographer name] and its affiliates, officers, directors, employees, agents and representatives from any and all claims and demands arising out of or in connection with the use of the photographs taken.
I have read this release and fully understand its contents. I agree to be bound by its terms.
Signature of Parent/Guardian: ___________________________
Printed Name of Parent/Guardian: ________________________
Date: ___________________