Illustrative example
A friend introduces the eventual buyer to a house and afterwards asks for three per cent of the price. He has never held a broker's license.
No one may bring or maintain an action in a New York court for compensation for services rendered in buying or selling real estate without alleging and proving that they were a duly licensed broker or salesperson on the date the alleged cause of action arose. The burden sits on the person claiming the fee, and the date that counts is when the cause of action arose - not when the introduction was made.
They agree a fixed thank-you payment unconnected to the sale price, described between them as a gift rather than a commission, and both treat the matter as closed.