One who assumes to act as an agent is responsible to third persons as a principal for that person's acts in the course of that person's agency in any of the following cases, and in no others:
1. When, with that person's consent, credit is given to that person personally in a transaction.
2. When that person enters into a written contract in the name of that person's principal without a good-faith belief in having the authority to do so.
3. When that person's acts are wrongful in their nature.