(1) A person has "knowledge" of a fact within the meaning of this chapter not only when he has actual knowledge thereof, but also when he has knowledge of such other facts as in the circumstances shows bad faith.

(2) A person has "notice" of a fact within the meaning of this chapter when the person who claims the benefit of the notice

(a) states the fact to such person or

(b) delivers through the mail or by other means of communication a written statement of the fact to such person or to a proper person at his place of business or residence.