Police forces, probation services and other government agencies keep tabs on dangerous criminals in communities across England and Wales using management plans known as multi-agency public protection (MMAPPA) arrangement.
Ministry of Justice data shows 3,662 people convicted of sex crimes were being managed under MAPPAs in the Greater Manchester policing area at the end of March.
But the figures show that sex offenders were cautioned or convicted more than 1,640 times for breaching notification requirements in 2020-21 – 184 of the breaches were recorded in Greater Manchester.
Jayne Butler, CEO of Rape Crisis England and Wales, said the organisation welcomed any measures taken to hold sexual abusers to account but said MAPPAs were not sufficient in keeping victims and survivors safe nationally.
She said: “The number of those cautioned or convicted for breaches is unacceptable, and the true extent of those breaches is unlikely to be reflected in these figures.
Offenders now have the right to apply to have lifetime MAPPAs revoked and, in 2020-21, more than 400 offenders nationwide were successful in doing so – nine in Greater Manchester.
An MoJ spokesman said the number of serious further offences committed by those subject to MAPPAs was at an eight-year low