Is it candid photo when photographer uses models to create impression of the real life? The great example is the famous story of “Kiss at the Hôtel de Ville”, by Robert Doisneau. Unfortunately, I don’t have my own picture to show because I don’t have money for models or actors.
Is it candid picture of the people who make pose for somebody else’s camera? I don’t know. Here is my photo take on it.
How about taking picture of the people with their photographer? Well. This is, obviously, candid picture of photographer.
Related topics
What is “the candid photography of strangers”?
Candid Street Photo 
my take is simple: a set up ain’t no candid 😉