The former Ulster player has signed to the French top 14 club as part of a two-year deal.
Paddy Jackson, along with former teammate Stuart Olding, had his contract for Ulster and Ireland cancelled in April despite being found not guilty of raping the same woman.
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The 26-year-old fly-half was linked with a host of clubs in recent weeks including Sale Sharks in England, Clermont in France and Waikato in New Zealand before his official deal with Perpignan was confirmed.
🚨SIGNATURE OFFICIELLE 🚨
Le Président, @F_Riviere , a le plaisir d'annoncer la signature officielle pour 2 saisons du demi d'ouverture, PADDY JACKSON. https://t.co/qbVnEkosWH#GENERATIONUSAP pic.twitter.com/Du2G66m4pb— Usap (@usap_officiel) June 8, 2018
Christian Lanta, sporting director for Perpignan confirmed the news in a statement: "Paddy Jackson, in the tradition of Irish 10s, knows how to bring his individual qualities to benefit the collective."
"A proven kicker, a talented playmaker, Paddy can bring his international experience to the team," he added.