A small village lay just over the farthest hill. When he had to feed, he went there. And when he left after feeding, the people he'd met, even those he'd fed upon, immediately forgot he'd been there at all. Every time he entered the village, the residents greeted him as a new visitor. That was his power, his curse, his salvation; no one remembered him.
Linda Howard, Blood Born
paranormal-urban-fantasy, vampires