Final answer:
Agent Charlie's false promise of property advertising to Seller Able without intending to follow through is an act of misrepresentation, which is unethical and potentially fraudulent in real estate law. Real estate agents must adhere to ethical standards and fiduciary duties to their clients.
Step-by-step explanation:
Agent Charlie, who took a listing from Seller Able, committed a serious violation by promising advertising services with no intention of fulfilling that promise. This conduct is unethical and is referred to as misrepresentation. Misrepresentation in real estate involves making false statements or promises to a client with the intent not to follow through. In real estate law, this behavior is often considered fraudulent, particularly if there is intent to deceive. It's important for all real estate professionals to adhere to their jurisdiction's code of ethics and to the fiduciary duties owed to their clients, which include loyalty, confidentiality, obedience, accounting, and disclosure.