Mo. Rev. Stat. § 486.730: Official seal, placement of, elements.

1. Near the notary's official signature on each paper notarial certificate, the notary shall affix a sharp, legible, permanent, and photographically reproducible image of the official seal that shall include the following elements:

(1) The notary's name exactly as stated on the commission;

(2) The identification number of the notary's commission;

(3) The words "Notary Public", "Notary Seal", and "State of Missouri" and "My commission expires (commission expiration date)"; and

(4) A border in a rectangular or circular shape no larger than one sixteenth of an inch, surrounding the required words.

2. Illegible information within a seal impression may be typed or printed legibly by the notary adjacent to but not within the impression, or another impression may be legibly affixed nearby.

3. An embossed seal impression that is not photographically reproducible may be used in addition to, but not in place of, the official seal described in subsection 1 of this section.

4. A seal as described in subsection 1 of this section shall not be affixed over printed or written matter.