“Each notary public shall provide, keep, and use a seal which is either a photographically reproducible engraved embosser or a black inked rubber stamp to be used on the document being notarized.” To be legally recognized, the official seal must contain: The notary’s name, the assigned commission number, “Notary Seal”, “Notary Public”, State of Missouri”, their expiration date and the county for which they are commissioned.
Source: RSMo 486.285[1]