At one point election officials decided my sig wasn't a sig. Had to sign it a few times right in front of them - which worked.
Prison staff called my sig "The Schwing." I'd describe it as a check mark with a curved line trailing to the right (like Nike's logo). As Fred noted, it's replicated on my DMV license (which I often have to show cause my sig isn't legible and has no alphanumeric characters). DMV initially rejected it until, once again, I performed a demo of it.
Hunter
Back because a Wise Man said to me, "We're all fallible, and recognizing our own errors is just part of the learning process."