It is the actual, hand-signed signature of Lopresti. It is not a pre-printed image on the print. No third party is involved.
Signed Aaron Lopresti Sketchbook Volume 2 2007
Anthony Marques SIGNED Batman & Robin The Audio Adventures Comic Art Print
David K. Wong Signed batman/Green dragon Art prints 11x 8.5
Batman Gold Foil Sicker Signed by Bob Kane (Creator of Batman) BatFace
2015 SDCC BATMAN & JOKER ART PRINT SIGNED BY BRANDON PETERSON 18X24 #'D 1/100
Michelle Pfeiffer Signed Autographed Batman Returns Catwoman Prop 1:1 Mask COA
