The failure of an agent to disclose that he or she is working for another, called the principal. Most states require real estate agency disclosure before a person reveals any confidential information.
Example: Ralph asks his next-door neighbor, real estate agent Beronda, to help him find a house. Beronda agrees, but she must disclose to Ralph that she will work as a subagent for the sellers (the typical situation) and will not be Ralph's agent. She will owe Ralph only the duty of honesty and no other duties.