In my years as a photographer, I have learned a few things about people. Once a commitment is made, most usually follow through. Inquiries, on the other hand, do not.
Many call to schedule headshot, portraits, weddings, family sessions, model portfolios, etc. Most follow though. Cancellations on the other hand are disrespectful to both of us, and our time management.
If you agree to a session with me, then a prepayment is preferred. It causes both of us to commit in agreement.
Thus, as a new practice, I will be taking prepayments before scheduling headshot appointments.