Gold Coast superstar Jarryd Hayne has denied he was fined by the Titans for having a bad attitude, saying it was for heading to Sydney for treatment without the permission of coach Neil Henry.

But in a series of cryptic tweets, he also vented that "Loose lips sinks ships!".

In the late night tweets on Sunday, the former Parramatta fullback and NFL star confirmed the fine but insisted he was given the all clear to fly south by one of the team's co-captains Ryan James and Kevin Proctor.

"Was meant to be cap sess. Captain said was ok 4me 2get treatment in syd! Coach found out and fined me. Media will milk it!!!!"