Mo. Rev. Stat. § 570.140: Deceptive business practice — penalty.

1. A person commits the offense of deceptive business practice if in the course of engaging in a business, occupation or profession, he or she recklessly:

(1) Uses or possesses for use a false weight or measure, or any other device for falsely determining or recording any quality or quantity;

(2) Sells, offers, displays for sale, or delivers less than the represented quantity of any commodity or service;

(3) Takes or attempts to take more than the represented quantity of any commodity or service when as buyer he or she furnishes the weight or measure;

(4) Sells, offers, or exposes for sale adulterated or mislabeled commodities;

(5) Makes a false or misleading written statement for the purpose of obtaining property or credit;

(6) Promotes the sale of property or services by a false or misleading statement in any advertisement; or

(7) Advertises in any manner the sale of property or services with the purpose not to sell or provide the property or services:

(a) At the price which he or she offered them;

(b) In a quantity sufficient to meet the reasonably expected public demand, unless the quantity is specifically stated in the advertisement; or

(c) At all.

2. The offense of deceptive business practice is a class A misdemeanor.