At about 10:30 a.m. Friday, the suspect walked into the Wells Fargo and displayed a note to the teller, according to police.
The man did not brandish any weapons and reportedly said, "Thanks again," when he left the bank on foot, police said.
The man is white, believed to be in his mid 30s and wore a black baseball cap, sunglasses and a fake mustache during the robbery, according to police.
Anyone with information regarding the robberies is asked to called Rohnert Park Department of Public Safety at (707) 584-2600.
