A man with a red beard is not an official ginger because he need not be pale, freckled, or be without a soul.
The most obvious gingerbeards are guys with black or dark hair that have random patches of red hair in their facial hair.
Also common is a beard that is entirely red, that awkwardly meets the different colored hair around the area of the sideburns.
Eric: That's a gingerbeard dumbass.
Connie: Wow, that's odd.
Rick: Yeah, why does he have a red beard when his natural hair color is obviously black?
Marjory: But he's not a ginger!
Rick: But that is fo sho a gingerbeard.
Son: Mom, hy does that guy have a red goatee and black beard?
Mom: Son, that's a gingerbeard, hopefully you'll be lucky enough to not become one someday.
Friend: Dude, that guy needs to get rid of that ginger beard, keep walking around like that and he's gonna get mugged for his pot of gold!