Pro Stamps offers the Minnesota Notary Public stamp certified by the requirements of the Minnesota Secretary of State.
Minn. Stat. 359.03 subd. 3: rectangular, max 3/4 in high x 2 1/2 in wide, serrated or milled edge border. Must contain the Minnesota state seal, name as on commission, 'Notary Public' (or 'Notarial Officer'), and 'My commission expires' + date (or 'My term is indeterminate'). Must be legibly reproducible; may be affixed electronically.