The Super Eagles midfielder left the Italian club for Trabzonspor in Turkey last summer, but they have failed to pay him for the final two months of his contract.
He eventually dragged Lazio to the world football governing body, when he was tired of waiting for his money.
“FIFA have given Lazio till November 29 to pay Onazi or face their wrath. He is being owed two months’ salary,” a source informed newsmen.
Onazi was in action for Nigeria early this month, as they defeated Algeria 3-1 in a 2018 World Cup qualifier played in Uyo.