Gwent Police is looking for 32-year-old Daniel Wynne from Caerphilly, who has been recalled to prison for breaching his licence conditions.
Wynne was released from prison on July 24 of this year and was serving a sentence for wounding with intent to cause grievous bodily harm.
Anyone with information can call 101, quoting reference 1700427869, or contact Crimestoppers anonymously on 0800 555 111.