Caldwell v. City or Rome

1. “Powers of all public officers are defined by law, and all persons must take notice thereof. The public can not be estopped by the acts of any officer done in the exercise of a power not conferred.” Civil Code (1910), § 303; Laing v. Americus, 86 Ga. 756 (13 S. E. 107) ; Town of Wadley v. Lancaster, 124 Ga. 354 (52 S. E. 335) ; Southern Express Co. v. B. R. Electric Co., 126 Ga. 472 (55 S. E. 254). “A municipality can not be held liable upon an implied contract for the value of any benefits received by it under a contract made with one of its officials, where the municipality is expressly…