Mo. Rev. Stat. § 275.090: Stock to be paid for prior to issuance.

No share of stock having a par value shall be issued by any such association unless, and until, the par value thereof has in good faith been paid into the treasury of the association in lawful money of the United States, and no share of capital stock without par value shall be issued by any association until the value thereof, as determined in its articles of association, has in good faith been paid to the treasurer of the association in lawful money of the United States.