Mo. Rev. Stat. § 486.660: Prohibited acts.

A notary shall not:

(1) Execute a notarial certificate containing information known or believed by the notary to be false;

(2) Affix an official signature or seal on a notarial certificate that is incomplete;

(3) Affix an official signature or seal on a notarial certificate other than at the time of notarization and in the presence of the principal; or

(4) Provide or send a signed or sealed notarial certificate to another person with the understanding that it will be completed or attached to a document outside of the notary's presence.