They appear legitimate and have a client list as well as names of previous talent they have represented, which can always be checked for accuracy. As long as they don't try to get you to pay any upfront fees you should be okay.
Wilhelmina-Evolution in Charlotte, North Carolina lists Justice for Girls as one of its clients.
Swish Model Management appears to be the most reputable modeling agency that is not a school.
Yes
Use a reputable one. get a recommendation from an agent not an agency
You must be signed to a reputable modeling agency that has JC Penny's as a client.
Two reputable modeling agencies are the kamera kids professional modeling and Carolyn's model and talent agency both located in Toronto. http://www.kamerakids.com/ http://www.carolynsonline.com/
Rosey's in Sydney is a well know and reputable agency that represents both models and actors.
Your child will have to be signed to a reputable and legit local modeling agency that has a children's division.
It is best to find a modeling agency in your town to represent you and find you legit and well paying work. Make sure the agency you send in your pictures and information to has a teen division.
wilhelmina Modeling Agency
There are way too many modeling agencies in California to name but many are legit, reputable and represent kids. A basic Google search will give you a list of the most notable agencies. Visit the official agency websites, which will contain all of the info you're looking for, including what types of models they represent.
Nevs Modeling Agency is located in London.