The 20-year-old centre spent an hour at Auckland Central Police station on Sunday where he was given a formal pre-charge warning for disorderly behaviour after jumping from a ferry into the harbour.
Tuilagi, who was fined £3,000 by the Rugby Football Union, landed back in England today with the rest of the squad following their quarter-final exit to France at the weekend.
The Samoa-born player will face more questions when he returns to Leicester.
"As a club, we are very mindful of the image of the game and the effect that our players' actions have on our fans and sponsors," Tigers' chief operating officer Simon Cohen told the Leicester Mercury.
"We will have a chat with Manu when he gets back to the club.
"It would be wrong to pre-judge any of the issues until we have spoken to him and seen what has been involved.
"But we will sit down with him and take into account the need to protect the image of the game, while also recognising any investigation and punishment that has been metered out in New Zealand.
"It would be a shame if anyone remembers Manu Tuilagi's time in New Zealand for anything other than what happened on the pitch."
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