Edit: as the other comment mentions, most banks where you have an account offer this for free. My local UPS store where I have a mailbox also offers the service to me for free.
American notary: someone who doesn’t have a history of fraud, sat through a workshop and passed a test.
German Notar: a very specialized lawyer, bills like a very specialized lawyer.
Theoretically, you can get stuff notarized at US embassies and consulates, for $50 and an appointment, must bring your own witness(es). That of course has not been an option much of the past year.
(Finger print is not legally required though.)