A man wearing what appeared to be a blonde wig and a fake beard robbed the FSG Bank on Lee Highway at Ooltewah on Thursday.
Authorities said he handed a note to a teller at 1:19 p.m. and intimated that he had a weapon.
The teller was able to slip a dye pack into the cash that was handed him.
He walked past a nearby restaurant and into a wooded area.
He was believed to be in his 30s and was wearing all black.