Bailey Smith is on his “final warning” from the AFL .

The controversial Geelong midfielder has tested the patience of league headquarters throughout his first year at the Cats, which has included several indiscretions.

Now, in a physical letter mailed to Smith and, the AFL has made it clear the 24-year-old Cat is out of lives.

“The AFL has finally put a line in the sand,” Mitch Cleary told 7NEWS Melbourne on Monday.

“Smith’s recent social media activity prompting the league to deliver him one final warning.

“The view from HQ is that a series of minor incidents now all add up to something much more.

“This year alone, he was fined twice for flipping the bird in back-to-back games in April, he then hinted at the use of nose beers — or cocaine — via Instagram. That prompted a firesid

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