The New Zealand Rugby Union said there were "some inconsistencies" in Aaron Smith's testimony. Photo: David Moir/EPA

WELLINGTON – All Black scrumhalf Aaron Smith has received a formal written warning from the New Zealand Rugby Union after an investigation into evidence he gave an earlier inquiry into his tryst with a woman in a disabled toilet at Christchurch Airport.

Smith was suspended for one Test, voluntarily stood down for another and received an official warning from New Zealand Rugby last year following revelations of the liaison.

Australian media in August published what they said were messages between the woman and Smith which they said proved he had misled All Black management about the nature of their relationship.

NZR said in a news release on Saturday that the second probe had revealed “some inconsistencies” between Smith's testimony and the information published in the media, but it had not had a “material impact” on the outcome of the original hearing.

“Being honest, particularly in a disciplinary proceeding, is critically important for any employer, and that is certainly the case with NZR,” said NZR chief Steve Tew.

“To reinforce this point, we have issued Aaron Smith with a formal written warning.”