North Melbourne has confirmed it will not appeal the AFL Tribunal's decision to suspend forward Paul Curtis for three games.

The Kangaroos argued that the action, which caused a concussion to Hamish Davis, did not constitute a dangerous tackle and the impact should be altered from severe to low.

The club also argued it was the momentum of the tackle which was the main contributing factor to the outcome, a notion the AFL Tribunal disagreed with.

North Melbourne's Jy Simpkin expressed significant displeasure with the decision via Instagram on Tuesday night.

"The AFL needs to get it together, the constant rule changes and the MRO is laughable,” Simpkin said.

“Players don't know what they can and can't do anymore. Just hope for the best each week."

Curtis will miss games against Richmond, Essendon and Port Adelaide.

"The vision shows Davis had both feet on the ground when he handballed and it was the technique of Curtis that resulted in them being brought to ground,” Tribunal Chair Richard Gleeson said.

“A reasonable player in the circumstances would have kept their feet in the tackle or at least attempted to do so or would have released either or both of Davis' arms, particularly once the handball had been effected or would have rotated or attempted to rotate Davis onto himself to some extent. Curtis did none of this.”

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