Muhammed Idrees, 48, was arrested on January 12 this year after police received reports from a 'Keeping Kids Safe' group about Idrees communicating sexually with children.
During Facebook chats, Idrees had been messaging people who he believed were girls aged 13 and 14, but were actually adults trying to catch paedophiles.
The messages were of a sexual nature, asking the girls to send indecent images of themselves and even suggesting they meet up at hotels and telling the girls he would buy them gifts. He also sent them explicit images of himself.
He was released on bail while investigations continued, however information came to light that Idrees had left the UK for France, going on to Germany, before returning to the UK on June 15 when he was further arrested.
In August 2017, Idrees was placed on the Sex Offenders Register after being convicted of two sexual assaults.
Conditions of being a registered sex offender living in the community are for them to be closely monitored by officers from the Public Protection Unit, including checks such as their online activity, access to digital devices and keeping record of their registered address.
DS Kayleigh Smith, from the Public Protection Unit, said: "It is quite clear Idrees had no regard for the conditions placed upon him as part of being a registered sex offender, he failed to attend appointments, didn’t complete his annual notification with us and failed to inform us of his registered address – all of these measures are in place for us, as the Public Protection Unit, to monitor sex offenders to ensure they do not pose a risk to our communities.
"His behaviour towards who he believed was children shows he clearly has a sexual interest in children and poses a significant risk to our communities."
Idrees, from Fletton, admitted three counts of attempting to engage in sexual communication with a child and failing to comply with the notification requirements of the Sex Offenders Register by failing to notify police of a change in address.
He appeared at Peterborough Crown Court on Wednesday, October 14, where he was sentenced to three years and three months in prison.
He was also placed on the Sex Offenders Register for life and made subject of an indefinite Sexual Harm Prevention Order (SHPO).